Subtract 18/20 from 60/21
1st number: 2 18/21, 2nd number: 18/20
60/21 - 18/20 is 137/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
60/21 = 60 × 20/21 × 20 = 1200/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
18/20 = 18 × 21/20 × 21 = 378/420 - Subtract the two like fractions:
1200/420 - 378/420 = 1200 - 378/420 = 822/420 - After reducing the fraction, the answer is 137/70
- In mixed form: 167/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-36/20 60/42-18/20 60/21-18/40 60/21-54/20 60/63-18/20 60/21-18/60 60/21-90/20