Answers

Subtract 16/81 from 63/20

1^st number: 3 3/20, 2^nd number: 16/81

63/20 - 16/81 is 4783/1620.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   63/20 = 63 × 81/20 × 81 = 5103/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   16/81 = 16 × 20/81 × 20 = 320/1620
4. Subtract the two like fractions:
   5103/1620 - 320/1620 = 5103 - 320/1620 = 4783/1620
5. In mixed form: 21543/1620

MathStep (Works offline)

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

Related: ⁶³/₂₀-³²/₈₁ ⁶³/₄₀-¹⁶/₈₁ ⁶³/₂₀-⁴⁸/₈₁ ⁶³/₆₀-¹⁶/₈₁ ⁶³/₂₀-⁸⁰/₈₁

Subtract Fractions Calculator