Add 90/7 and 9/60, Solve 12 6/7 + 9/60 as a fraction

Add 90/7 and 9/60

1^st number: 12 6/7, 2^nd number: 9/60

90/7 + 9/60 is 1821/140.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 7 × 60 = 420,
90/7 = 90 × 60/7 × 60 = 5400/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
9/60 = 9 × 7/60 × 7 = 63/420
Add the two like fractions:
5400/420 + 63/420 = 5400 + 63/420 = 5463/420
5463/420 simplified gives 1821/140
So, 90/7 + 9/60 = 1821/140
In mixed form: 131/140

MathStep (Works offline)

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