Answers

Subtract 36/80 from 30/84

30/84 - 36/80 is -13/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   30/84 = 30 × 20/84 × 20 = 600/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   36/80 = 36 × 21/80 × 21 = 756/1680
4. Subtract the two like fractions:
   600/1680 - 756/1680 = 600 - 756/1680 = -156/1680
5. After reducing the fraction, the answer is -13/140

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁶⁰/₈₄-³⁶/₈₀ ³⁰/₈₄-⁷²/₈₀ ⁹⁰/₈₄-³⁶/₈₀

Subtract Fractions Calculator