Answers

Subtract 21/84 from 63/5

1^st number: 12 3/5, 2^nd number: 21/84

63/5 - 21/84 is 247/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 5 × 84 = 420,
   63/5 = 63 × 84/5 × 84 = 5292/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   21/84 = 21 × 5/84 × 5 = 105/420
4. Subtract the two like fractions:
   5292/420 - 105/420 = 5292 - 105/420 = 5187/420
5. After reducing the fraction, the answer is 247/20
6. In mixed form: 127/20

MathStep (Works offline)

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

Related: ⁶³/₅-⁴²/₈₄ ⁶³/₁₀-²¹/₈₄ ⁶³/₅-⁶³/₈₄ ⁶³/₁₅-²¹/₈₄ ⁶³/₂₅-²¹/₈₄ ⁶³/₃₅-²¹/₈₄

Subtract Fractions Calculator