Subtract 21/60 from 18/5
1st number: 3 3/5, 2nd number: 21/60
18/5 - 21/60 is 13/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
18/5 = 18 × 12/5 × 12 = 216/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Subtract the two like fractions:
216/60 - 21/60 = 216 - 21/60 = 195/60 - After reducing the fraction, the answer is 13/4
- In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-21/60 18/5-42/60 18/10-21/60 54/5-21/60 18/5-63/60 18/15-21/60 90/5-21/60 18/25-21/60 18/35-21/60