Fraction calculator

This fraction calculator performs all fraction operations - addition, subtraction, multiplication, division and evaluates expressions with fractions. It also shows detailed step-by-step information.

The result:

15 - 10 5/12 = 55/12 = 4 7/12 ≅ 4.5833333

The result spelled out in words is fifty-five twelfths (or four and seven twelfths).

How do we solve fractions step by step?

Conversion a mixed number 10 5/12 to a improper fraction: 10 5/12 = 10 5/12 = 10 · 12 + 5/12 = 120 + 5/12 = 125/12

To find a new numerator:
a) Multiply the whole number 10 by the denominator 12. Whole number 10 equally 10 * 12/12 = 120/12
b) Add the answer from the previous step 120 to the numerator 5. New numerator is 120 + 5 = 125
c) Write a previous answer (new numerator 125) over the denominator 12.

Ten and five twelfths is one hundred twenty-five twelfths.
Subtract: 15 - 125/12 = 15/1 - 125/12 = 15 · 12/1 · 12 - 125/12 = 180/12 - 125/12 = 180 - 125/12 = 55/12
The first operand is an integer. It is equivalent to a fraction 15/1. It is suitable to adjust both fractions to a common (equal) denominator for subtracting fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(1, 12) = 12. It is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 1 × 12 = 12. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, fifteen minus one hundred twenty-five twelfths equals fifty-five twelfths.

Rules for expressions with fractions:

Fractions - write a forward slash to separate the numerator and 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 whole part and fraction and use a forward slash to input fraction i.e., 1 2/3 . A negative mixed fraction write for example as -5 1/2.
A slash is both a sign for fraction line and division, use a colon (:) for division fractions i.e., 1/2 : 1/3.
Decimals (decimal numbers) enter with a decimal dot . and they are automatically converted to fractions - i.e. 1.45.

Math Symbols

Symbol	Symbol name	Symbol Meaning	Example
+	plus sign	addition	1/2 + 1/3
-	minus sign	subtraction	1 1/2 - 2/3
*	asterisk	multiplication	*2/3 3/4**
×	times sign	multiplication	2/3 × 5/6
:	division sign	division	1/2 : 3
/	division slash	division	1/3 / 5
:	colon	complex fraction	1/2 : 1/3
^	caret	exponentiation / power	1/4^3
()	parentheses	calculate 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 are:

PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
BEDMAS: Brackets, Exponents, Division, Multiplication, Addition, Subtraction.
BODMAS: Brackets, Order (or "Of"), Division, Multiplication, Addition, Subtraction.
GEMDAS: Grouping symbols (brackets: (){}), Exponents, Multiplication, Division, Addition, Subtraction.
MDAS: Multiplication and Division (same precedence), Addition and Subtraction (same precedence). MDAS is a subset of PEMDAS.

Important Notes:
1. Multiplication/Division vs. Addition/Subtraction: Always perform multiplication and division *before* addition and subtraction.
2. Left-to-Right Rule: Operators with the same precedence (e.g., + and -, or * and /) must be evaluated from left to right.