Answers

Subtract 72/80 from 54/20

1^st number: 2 14/20, 2^nd number: 72/80

54/20 - 72/80 is 9/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   54/20 = 54 × 4/20 × 4 = 216/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   72/80 = 72 × 1/80 × 1 = 72/80
4. Subtract the two like fractions:
   216/80 - 72/80 = 216 - 72/80 = 144/80
5. After reducing the fraction, the answer is 9/5
6. In mixed form: 14/5

MathStep (Works offline)

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

Related: ⁵⁴/₄₀-⁷²/₈₀ ⁵⁴/₆₀-⁷²/₈₀

Subtract Fractions Calculator