Answers

Subtract 4/20 from 30/84

30/84 - 4/20 is 11/70.

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,
   30/84 = 30 × 5/84 × 5 = 150/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   4/20 = 4 × 21/20 × 21 = 84/420
4. Subtract the two like fractions:
   150/420 - 84/420 = 150 - 84/420 = 66/420
5. After reducing the fraction, the answer is 11/70

MathStep (Works offline)

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

Related: ⁶⁰/₈₄-⁴/₂₀ ³⁰/₈₄-⁸/₂₀ ³⁰/₈₄-⁴/₄₀ ⁹⁰/₈₄-⁴/₂₀ ³⁰/₈₄-¹²/₂₀ ³⁰/₈₄-⁴/₆₀ ³⁰/₈₄-²⁸/₂₀

Subtract Fractions Calculator