Add 56/63 and 81/60, Solve 56/63 + 1 21/60 as a fraction

Add 56/63 and 81/60

1^st number: 56/63, 2^nd number: 1 21/60

56/63 + 81/60 is 403/180.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 60 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 63 × 20 = 1260,
56/63 = 56 × 20/63 × 20 = 1120/1260
Likewise, for the 2nd fraction, since 60 × 21 = 1260,
81/60 = 81 × 21/60 × 21 = 1701/1260
Add the two like fractions:
1120/1260 + 1701/1260 = 1120 + 1701/1260 = 2821/1260
2821/1260 simplified gives 403/180
So, 56/63 + 81/60 = 403/180
In mixed form: 243/180

MathStep (Works offline)

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