Fraction Calculator

This fraction calculator performs all fraction operations - addition, subtraction, multiplication, and division — and evaluates expressions with fractions. Each calculation includes detailed step-by-step explanations.

The result:

1/12 + 4 + 13/28 = 191/42 = 4 23/42 ≅ 4.547619

Spelled out: one hundred ninety-one forty-seconds (or four and twenty-three forty-seconds).

How do we solve fractions step by step?

Add: 1/12 + 4 = 1/12 + 4/1 = 1/12 + 4 · 12/1 · 12 = 1/12 + 48/12 = 1 + 48/12 = 49/12
The second operand is an integer. It is equivalent to the fraction 4/1. It is suitable to adjust both fractions to a common (equal) denominator for adding fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(12, 1) = 12. It is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 12 × 1 = 12. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one twelfth plus four equals forty-nine twelfths.
Add: the result of step No. 1 + 13/28 = 49/12 + 13/28 = 49 · 7/12 · 7 + 13 · 3/28 · 3 = 343/84 + 39/84 = 343 + 39/84 = 382/84 = 2 · 191/2 · 42 = 191/42
It is suitable to adjust both fractions to a common (equal) denominator for adding fractions. The common denominator you can calculate as the least common multiple of both denominators - LCM(12, 28) = 84. It is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 12 × 28 = 336. In the following intermediate step, cancel by a common factor of 2 gives 191/42.
In other words, forty-nine twelfths plus thirteen twenty-eighths equals one hundred ninety-one forty-seconds.

Rules for expressions with fractions:

Fractions - Use a forward slash to separate the numerator and denominator. For example, for five-hundredths, enter 5/100.

Mixed numbers Leave one space between the whole number and the fraction part, and use a forward slash for the fraction. For example, enter 1 2/3 . For negative mixed numbers, write the negative sign before the whole number, such as -5 1/2.

Division of fractions - Since the forward slash is used for both fraction lines and division, use a colon (:) to divide fractions. For example, to divide 1/2 by 1/3, enter 1/2 : 1/3.

Decimals Enter decimal numbers using a decimal point (.), and they will be automatically converted to fractions. For example, enter 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)

Order of Operations

Ever wondered why calculators don't just work left to right? This calculator follows the mathematical order of operations — a set of rules that ensures everyone solves expressions the same way, every time.

Popular Memory Tricks

Different regions use different mnemonics to remember this order:

* 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 (parentheses, brackets, braces: (){}), Exponents, Multiplication, Division, Addition, Subtraction

The Golden Rules

Rule 1: Multiplication and division always come before addition and subtraction. Think of them as the VIPs that skip to the front of the line!

Rule 2: When operations have equal priority (like × and ÷, or + and −), work from left to right—just like reading a book.

Rule 3: Parentheses change the natural order of evaluation of operations.