Add 63/56 and 90/63, Solve 1 7/56 + 1 27/63 as a fraction

Add 63/56 and 90/63

1^st number: 1 7/56, 2^nd number: 1 27/63

63/56 + 90/63 is 143/56.

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

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 56 × 9 = 504,
63/56 = 63 × 9/56 × 9 = 567/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
90/63 = 90 × 8/63 × 8 = 720/504
Add the two like fractions:
567/504 + 720/504 = 567 + 720/504 = 1287/504
1287/504 simplified gives 143/56
So, 63/56 + 90/63 = 143/56
In mixed form: 231/56

MathStep (Works offline)

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