Subtract 70/25 from 49/21
1st number: 2 7/21, 2nd number: 2 20/25
49/21 - 70/25 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
49/21 = 49 × 25/21 × 25 = 1225/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
70/25 = 70 × 21/25 × 21 = 1470/525 - Subtract the two like fractions:
1225/525 - 1470/525 = 1225 - 1470/525 = -245/525 - After reducing the fraction, the answer is -7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-70/25 49/42-70/25 49/21-70/50 49/63-70/25 49/21-70/75