Subtract 15/90 from 70/49
1st number: 1 21/49, 2nd number: 15/90
70/49 - 15/90 is 53/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
70/49 = 70 × 90/49 × 90 = 6300/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
15/90 = 15 × 49/90 × 49 = 735/4410 - Subtract the two like fractions:
6300/4410 - 735/4410 = 6300 - 735/4410 = 5565/4410 - After reducing the fraction, the answer is 53/42
- In mixed form: 111/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/49-30/90 70/98-15/90 70/49-45/90 70/49-75/90