Add 30/35 and 63/80, Solve 30/35 + 63/80 as a fraction

Add 30/35 and 63/80

30/35 + 63/80 is 921/560.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 35 × 16 = 560,
30/35 = 30 × 16/35 × 16 = 480/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
63/80 = 63 × 7/80 × 7 = 441/560
Add the two like fractions:
480/560 + 441/560 = 480 + 441/560 = 921/560
So, 30/35 + 63/80 = 921/560
In mixed form: 1361/560

MathStep (Works offline)

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