Add 70/49 and 4/72, Solve 1 21/49 + 4/72 as a fraction

Add 70/49 and 4/72

1^st number: 1 21/49, 2^nd number: 4/72

70/49 + 4/72 is 187/126.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 72 is 3528

Next, find the equivalent fraction of both fractional numbers with denominator 3528
For the 1st fraction, since 49 × 72 = 3528,
70/49 = 70 × 72/49 × 72 = 5040/3528
Likewise, for the 2nd fraction, since 72 × 49 = 3528,
4/72 = 4 × 49/72 × 49 = 196/3528
Add the two like fractions:
5040/3528 + 196/3528 = 5040 + 196/3528 = 5236/3528
5236/3528 simplified gives 187/126
So, 70/49 + 4/72 = 187/126
In mixed form: 161/126

MathStep (Works offline)

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