Answers

Subtract 21/60 from 90/54

1^st number: 1 36/54, 2^nd number: 21/60

90/54 - 21/60 is 79/60.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 60 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 54 × 10 = 540,
   90/54 = 90 × 10/54 × 10 = 900/540
3. Likewise, for the 2nd fraction, since 60 × 9 = 540,
   21/60 = 21 × 9/60 × 9 = 189/540
4. Subtract the two like fractions:
   900/540 - 189/540 = 900 - 189/540 = 711/540
5. After reducing the fraction, the answer is 79/60
6. In mixed form: 119/60

MathStep (Works offline)

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

Related: ⁹⁰/₅₄-⁴²/₆₀ ⁹⁰/₅₄-⁶³/₆₀

Subtract Fractions Calculator