Add 90/54 and 8/7
1st number: 1 36/54, 2nd number: 1 1/7
90/54 + 8/7 is 59/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378 - Add the two like fractions:
630/378 + 432/378 = 630 + 432/378 = 1062/378 - 1062/378 simplified gives 59/21
- So, 90/54 + 8/7 = 59/21
In mixed form: 217/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54+16/7 90/54+8/14 90/54+24/7 90/54+8/21 90/54+40/7 90/54+8/35 90/54+56/7 90/54+8/49