Add 7/54 and 90/84, Solve 7/54 + 1 6/84 as a fraction

Add 7/54 and 90/84

1^st number: 7/54, 2^nd number: 1 6/84

7/54 + 90/84 is 227/189.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 54 × 14 = 756,
7/54 = 7 × 14/54 × 14 = 98/756
Likewise, for the 2nd fraction, since 84 × 9 = 756,
90/84 = 90 × 9/84 × 9 = 810/756
Add the two like fractions:
98/756 + 810/756 = 98 + 810/756 = 908/756
908/756 simplified gives 227/189
So, 7/54 + 90/84 = 227/189
In mixed form: 138/189

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad