Answers

Subtract 48/72 from 45/20

1^st number: 2 5/20, 2^nd number: 48/72

45/20 - 48/72 is 19/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 20 × 18 = 360,
   45/20 = 45 × 18/20 × 18 = 810/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   48/72 = 48 × 5/72 × 5 = 240/360
4. Subtract the two like fractions:
   810/360 - 240/360 = 810 - 240/360 = 570/360
5. After reducing the fraction, the answer is 19/12
6. In mixed form: 17/12

MathStep (Works offline)

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

Related: ⁹⁰/₂₀-⁴⁸/₇₂ ⁴⁵/₂₀-⁹⁶/₇₂ ⁴⁵/₄₀-⁴⁸/₇₂ ⁴⁵/₆₀-⁴⁸/₇₂

Subtract Fractions Calculator