Subtract 18/60 from 21/7
1st number: 3 0/7, 2nd number: 18/60
21/7 - 18/60 is 27/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 7 × 60 = 420,
21/7 = 21 × 60/7 × 60 = 1260/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
18/60 = 18 × 7/60 × 7 = 126/420 - Subtract the two like fractions:
1260/420 - 126/420 = 1260 - 126/420 = 1134/420 - After reducing the fraction, the answer is 27/10
- In mixed form: 27/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-18/60 21/7-36/60 21/14-18/60 63/7-18/60 21/7-54/60 21/7-90/60 21/35-18/60 21/49-18/60