Add 72/7 and 21/54
1st number: 10 2/7, 2nd number: 21/54
72/7 + 21/54 is 1345/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 7 × 54 = 378,
72/7 = 72 × 54/7 × 54 = 3888/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Add the two like fractions:
3888/378 + 147/378 = 3888 + 147/378 = 4035/378 - 4035/378 simplified gives 1345/126
- So, 72/7 + 21/54 = 1345/126
In mixed form: 1085/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/7+42/54 72/14+21/54 72/7+63/54 72/21+21/54 72/35+21/54 72/49+21/54