Subtract 27/20 from 70/21
1st number: 3 7/21, 2nd number: 1 7/20
70/21 - 27/20 is 119/60.
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,
70/21 = 70 × 20/21 × 20 = 1400/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
27/20 = 27 × 21/20 × 21 = 567/420 - Subtract the two like fractions:
1400/420 - 567/420 = 1400 - 567/420 = 833/420 - After reducing the fraction, the answer is 119/60
- In mixed form: 159/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-54/20 70/42-27/20 70/21-27/40 70/21-81/20 70/63-27/20 70/21-27/60