Subtract 70/36 from 21/7
1st number: 3 0/7, 2nd number: 1 34/36
21/7 - 70/36 is 19/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 7 × 36 = 252,
21/7 = 21 × 36/7 × 36 = 756/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252 - Subtract the two like fractions:
756/252 - 490/252 = 756 - 490/252 = 266/252 - After reducing the fraction, the answer is 19/18
- In mixed form: 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-70/36 21/14-70/36 21/7-70/72 63/7-70/36 21/35-70/36 21/49-70/36