Add 9/15 and 42/35, Solve 9/15 + 1 7/35 as a fraction

Add 9/15 and 42/35

1^st number: 9/15, 2^nd number: 1 7/35

9/15 + 42/35 is 9/5.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105
Likewise, for the 2nd fraction, since 35 × 3 = 105,
42/35 = 42 × 3/35 × 3 = 126/105
Add the two like fractions:
63/105 + 126/105 = 63 + 126/105 = 189/105
189/105 simplified gives 9/5
So, 9/15 + 42/35 = 9/5
In mixed form: 14/5

MathStep (Works offline)

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