Subtract 16/45 from 70/21
1st number: 3 7/21, 2nd number: 16/45
70/21 - 16/45 is 134/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
70/21 = 70 × 15/21 × 15 = 1050/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
16/45 = 16 × 7/45 × 7 = 112/315 - Subtract the two like fractions:
1050/315 - 112/315 = 1050 - 112/315 = 938/315 - After reducing the fraction, the answer is 134/45
- In mixed form: 244/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-32/45 70/42-16/45 70/21-16/90 70/21-48/45 70/63-16/45 70/21-80/45