Add 70/42 and 42/18, Solve 1 28/42 + 2 6/18 as a fraction

Add 70/42 and 42/18

1^st number: 1 28/42, 2^nd number: 2 6/18

70/42 + 42/18 is 4/1.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
70/42 = 70 × 3/42 × 3 = 210/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126
Add the two like fractions:
210/126 + 294/126 = 210 + 294/126 = 504/126
504/126 simplified gives 4/1
So, 70/42 + 42/18 = 4/1

MathStep (Works offline)

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