Add 35/15 and 30/7, Solve 2 5/15 + 4 2/7 as a fraction

Add 35/15 and 30/7

1^st number: 2 5/15, 2^nd number: 4 2/7

35/15 + 30/7 is 139/21.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
35/15 = 35 × 7/15 × 7 = 245/105
Likewise, for the 2nd fraction, since 7 × 15 = 105,
30/7 = 30 × 15/7 × 15 = 450/105
Add the two like fractions:
245/105 + 450/105 = 245 + 450/105 = 695/105
695/105 simplified gives 139/21
So, 35/15 + 30/7 = 139/21
In mixed form: 613/21

MathStep (Works offline)

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