Add 90/7 and 21/27
1st number: 12 6/7, 2nd number: 21/27
90/7 + 21/27 is 859/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
90/7 = 90 × 27/7 × 27 = 2430/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189 - Add the two like fractions:
2430/189 + 147/189 = 2430 + 147/189 = 2577/189 - 2577/189 simplified gives 859/63
- So, 90/7 + 21/27 = 859/63
In mixed form: 1340/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+42/27 90/14+21/27 90/7+21/54 90/7+63/27 90/21+21/27 90/7+21/81 90/35+21/27 90/49+21/27