Add 15/63 and 72/49, Solve 15/63 + 1 23/49 as a fraction

Add 15/63 and 72/49

1^st number: 15/63, 2^nd number: 1 23/49

15/63 + 72/49 is 251/147.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 49 is 441

Next, find the equivalent fraction of both fractional numbers with denominator 441
For the 1st fraction, since 63 × 7 = 441,
15/63 = 15 × 7/63 × 7 = 105/441
Likewise, for the 2nd fraction, since 49 × 9 = 441,
72/49 = 72 × 9/49 × 9 = 648/441
Add the two like fractions:
105/441 + 648/441 = 105 + 648/441 = 753/441
753/441 simplified gives 251/147
So, 15/63 + 72/49 = 251/147
In mixed form: 1104/147

MathStep (Works offline)

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