Answers

Subtract 30/20 from 35/72

1^st number: 35/72, 2^nd number: 1 10/20

35/72 - 30/20 is -73/72.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 20 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   35/72 = 35 × 5/72 × 5 = 175/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   30/20 = 30 × 18/20 × 18 = 540/360
4. Subtract the two like fractions:
   175/360 - 540/360 = 175 - 540/360 = -365/360
5. After reducing the fraction, the answer is -73/72

MathStep (Works offline)

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

Related: ⁷⁰/₇₂-³⁰/₂₀ ³⁵/₇₂-⁶⁰/₂₀ ³⁵/₇₂-³⁰/₄₀ ³⁵/₇₂-⁹⁰/₂₀ ³⁵/₇₂-³⁰/₆₀

Subtract Fractions Calculator