Add 70/7 and 21/45
1st number: 10 0/7, 2nd number: 21/45
70/7 + 21/45 is 157/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
70/7 = 70 × 45/7 × 45 = 3150/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Add the two like fractions:
3150/315 + 147/315 = 3150 + 147/315 = 3297/315 - 3297/315 simplified gives 157/15
- So, 70/7 + 21/45 = 157/15
In mixed form: 107/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/7+42/45 70/14+21/45 70/7+21/90 70/7+63/45 70/21+21/45 70/35+21/45 70/49+21/45