Answers

Subtract 40/20 from 35/84

1^st number: 35/84, 2^nd number: 2 0/20

35/84 - 40/20 is -19/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   35/84 = 35 × 5/84 × 5 = 175/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   40/20 = 40 × 21/20 × 21 = 840/420
4. Subtract the two like fractions:
   175/420 - 840/420 = 175 - 840/420 = -665/420
5. After reducing the fraction, the answer is -19/12

MathStep (Works offline)

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

Related: ⁷⁰/₈₄-⁴⁰/₂₀ ³⁵/₈₄-⁸⁰/₂₀ ³⁵/₈₄-⁴⁰/₆₀

Subtract Fractions Calculator