Answers

Subtract 27/4 from 21/28

1^st number: 21/28, 2^nd number: 6 3/4

21/28 - 27/4 is -6/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 4 is 28
   
   Next, find the equivalent fraction of both fractional numbers with denominator 28
2. For the 1st fraction, since 28 × 1 = 28,
   21/28 = 21 × 1/28 × 1 = 21/28
3. Likewise, for the 2nd fraction, since 4 × 7 = 28,
   27/4 = 27 × 7/4 × 7 = 189/28
4. Subtract the two like fractions:
   21/28 - 189/28 = 21 - 189/28 = -168/28
5. After reducing the fraction, the answer is -6/1

MathStep (Works offline)

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

Related: ⁴²/₂₈-²⁷/₄ ²¹/₂₈-⁵⁴/₄ ²¹/₅₆-²⁷/₄ ²¹/₂₈-²⁷/₈ ⁶³/₂₈-²⁷/₄ ²¹/₂₈-⁸¹/₄ ²¹/₈₄-²⁷/₄ ²¹/₂₈-²⁷/₁₂ ²¹/₂₈-²⁷/₂₀ ²¹/₂₈-²⁷/₂₈

Subtract Fractions Calculator