Add 42/35 and 3/30, Solve 1 7/35 + 3/30 as a fraction

Add 42/35 and 3/30

1^st number: 1 7/35, 2^nd number: 3/30

42/35 + 3/30 is 13/10.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 35 × 6 = 210,
42/35 = 42 × 6/35 × 6 = 252/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210
Add the two like fractions:
252/210 + 21/210 = 252 + 21/210 = 273/210
273/210 simplified gives 13/10
So, 42/35 + 3/30 = 13/10
In mixed form: 13/10

MathStep (Works offline)

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