Add 18/7 and 90/27
1st number: 2 4/7, 2nd number: 3 9/27
18/7 + 90/27 is 124/21.
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,
18/7 = 18 × 27/7 × 27 = 486/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
90/27 = 90 × 7/27 × 7 = 630/189 - Add the two like fractions:
486/189 + 630/189 = 486 + 630/189 = 1116/189 - 1116/189 simplified gives 124/21
- So, 18/7 + 90/27 = 124/21
In mixed form: 519/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+90/27 18/14+90/27 18/7+90/54 54/7+90/27 18/21+90/27 18/7+90/81 90/7+90/27 18/35+90/27 18/49+90/27