Answers

Subtract 48/81 from 90/60

1^st number: 1 30/60, 2^nd number: 48/81

90/60 - 48/81 is 49/54.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 60 × 27 = 1620,
   90/60 = 90 × 27/60 × 27 = 2430/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   48/81 = 48 × 20/81 × 20 = 960/1620
4. Subtract the two like fractions:
   2430/1620 - 960/1620 = 2430 - 960/1620 = 1470/1620
5. After reducing the fraction, the answer is 49/54

MathStep (Works offline)

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

Related: ⁹⁰/₆₀-⁹⁶/₈₁

Subtract Fractions Calculator