Subtract 21/18 from 60/21
1st number: 2 18/21, 2nd number: 1 3/18
60/21 - 21/18 is 71/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
60/21 = 60 × 6/21 × 6 = 360/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
21/18 = 21 × 7/18 × 7 = 147/126 - Subtract the two like fractions:
360/126 - 147/126 = 360 - 147/126 = 213/126 - After reducing the fraction, the answer is 71/42
- In mixed form: 129/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-42/18 60/42-21/18 60/21-21/36 60/21-63/18 60/63-21/18 60/21-21/54 60/21-21/90