Fraction calculator



This fraction calculator performs all fraction operations and evaluates expressions with fractions. It also shows detailed step-by-step information about the fraction calculation procedure. The calculator helps find value from multiple fraction operations with two, three, or more fractions and numbers in one expression.

The result:

2/5 + 6 3/7 - 2 2/3 = 437/105 = 4 17/1054.1619048

The spelled result in words is four hundred thirty-seven one-hundred fifths (or four and seventeen one-hundred fifths).

How do we solve fractions step by step?

  1. Conversion a mixed number 6 3/7 to a improper fraction: 6 3/7 = 6 3/7 = 6 · 7 + 3/7 = 42 + 3/7 = 45/7

    To find a new numerator:
    a) Multiply the whole number 6 by the denominator 7. Whole number 6 equally 6 * 7/7 = 42/7
    b) Add the answer from the previous step 42 to the numerator 3. New numerator is 42 + 3 = 45
    c) Write a previous answer (new numerator 45) over the denominator 7.

    Six and three sevenths is forty-five sevenths.
  2. Add: 2/5 + 45/7 = 2 · 7/5 · 7 + 45 · 5/7 · 5 = 14/35 + 225/35 = 14 + 225/35 = 239/35
    It is suitable to adjust both fractions to a common (equal, identical) denominator for adding, subtracting, and comparing fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(5, 7) = 35. It is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 5 × 7 = 35. In the following intermediate step, it cannot further simplify the fraction result by canceling.
    In other words - two fifths plus forty-five sevenths is two hundred thirty-nine thirty-fifths.
  3. Conversion a mixed number 2 2/3 to a improper fraction: 2 2/3 = 2 2/3 = 2 · 3 + 2/3 = 6 + 2/3 = 8/3

    To find a new numerator:
    a) Multiply the whole number 2 by the denominator 3. Whole number 2 equally 2 * 3/3 = 6/3
    b) Add the answer from the previous step 6 to the numerator 2. New numerator is 6 + 2 = 8
    c) Write a previous answer (new numerator 8) over the denominator 3.

    Two and two thirds is eight thirds.
  4. Subtract: the result of step No. 2 - 8/3 = 239/35 - 8/3 = 239 · 3/35 · 3 - 8 · 35/3 · 35 = 717/105 - 280/105 = 717 - 280/105 = 437/105
    It is suitable to adjust both fractions to a common (equal, identical) denominator for adding, subtracting, and comparing fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(35, 3) = 105. It is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 35 × 3 = 105. In the following intermediate step, it cannot further simplify the fraction result by canceling.
    In other words - two hundred thirty-nine thirty-fifths minus eight thirds is four hundred thirty-seven one-hundred fifths.

Rules for expressions with fractions:

Fractions - use a forward slash to divide the numerator by the denominator, i.e., for five-hundredths, enter 5/100. If you use mixed numbers, leave a space between the whole and fraction parts.

Mixed numerals (mixed numbers or fractions) keep one space between the integer and
fraction and use a forward slash to input fractions i.e., 1 2/3 . An example of a negative mixed fraction: -5 1/2.
Because slash is both sign for fraction line and division, use a colon (:) as the operator of division fractions i.e., 1/2 : 1/3.
Decimals (decimal numbers) enter with a decimal point . and they are automatically converted to fractions - i.e. 1.45.


Math Symbols


SymbolSymbol nameSymbol MeaningExample
+plus signaddition 1/2 + 1/3
-minus signsubtraction 1 1/2 - 2/3
*asteriskmultiplication 2/3 * 3/4
×times signmultiplication 2/3 × 5/6
:division signdivision 1/2 : 3
/division slashdivision 1/3 / 5
:coloncomplex fraction 1/2 : 1/3
^caretexponentiation / power 1/4^3
()parenthesescalculate expression inside first-3/5 - (-1/4)

The calculator follows well-known rules for the order of operations. The most common mnemonics for remembering this order of operations are:
PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
BEDMAS - Brackets, Exponents, Division, Multiplication, Addition, Subtraction
BODMAS - Brackets, Of or Order, Division, Multiplication, Addition, Subtraction.
GEMDAS - Grouping Symbols - brackets (){}, Exponents, Multiplication, Division, Addition, Subtraction.
MDAS - Multiplication and Division have the same precedence over Addition and Subtraction. The MDAS rule is the order of operations part of the PEMDAS rule.
Be careful; always do multiplication and division before addition and subtraction. Some operators (+ and -) and (* and /) have the same priority and must be evaluated from left to right.

Fractions in word problems:



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