Answers

Subtract 1/84 from 28/20

1^st number: 1 8/20, 2^nd number: 1/84

28/20 - 1/84 is 583/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   28/20 = 28 × 21/20 × 21 = 588/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   1/84 = 1 × 5/84 × 5 = 5/420
4. Subtract the two like fractions:
   588/420 - 5/420 = 588 - 5/420 = 583/420
5. In mixed form: 1163/420

MathStep (Works offline)

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

Related: ⁵⁶/₂₀-¹/₈₄ ²⁸/₂₀-²/₈₄ ²⁸/₄₀-¹/₈₄ ⁸⁴/₂₀-¹/₈₄ ²⁸/₂₀-³/₈₄ ²⁸/₆₀-¹/₈₄ ²⁸/₂₀-⁵/₈₄ ²⁸/₂₀-⁷/₈₄

Subtract Fractions Calculator