Answers

Subtract 18/80 from 90/48

1^st number: 1 42/48, 2^nd number: 18/80

90/48 - 18/80 is 33/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 48 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 48 × 5 = 240,
   90/48 = 90 × 5/48 × 5 = 450/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   18/80 = 18 × 3/80 × 3 = 54/240
4. Subtract the two like fractions:
   450/240 - 54/240 = 450 - 54/240 = 396/240
5. After reducing the fraction, the answer is 33/20
6. In mixed form: 113/20

MathStep (Works offline)

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

Related: ⁹⁰/₄₈-³⁶/₈₀ ⁹⁰/₉₆-¹⁸/₈₀ ⁹⁰/₄₈-⁵⁴/₈₀ ⁹⁰/₄₈-⁹⁰/₈₀

Subtract Fractions Calculator