Add 4/72 and 70/63, Solve 4/72 + 1 7/63 as a fraction

Add 4/72 and 70/63

1^st number: 4/72, 2^nd number: 1 7/63

4/72 + 70/63 is 7/6.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 63 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
70/63 = 70 × 8/63 × 8 = 560/504
Add the two like fractions:
28/504 + 560/504 = 28 + 560/504 = 588/504
588/504 simplified gives 7/6
So, 4/72 + 70/63 = 7/6
In mixed form: 11/6

MathStep (Works offline)

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