Add 90/63 and 81/56, Solve 1 27/63 + 1 25/56 as a fraction

Add 90/63 and 81/56

1^st number: 1 27/63, 2^nd number: 1 25/56

90/63 + 81/56 is 23/8.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 56 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 63 × 8 = 504,
90/63 = 90 × 8/63 × 8 = 720/504
Likewise, for the 2nd fraction, since 56 × 9 = 504,
81/56 = 81 × 9/56 × 9 = 729/504
Add the two like fractions:
720/504 + 729/504 = 720 + 729/504 = 1449/504
1449/504 simplified gives 23/8
So, 90/63 + 81/56 = 23/8
In mixed form: 27/8

MathStep (Works offline)

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