Add 72/42 and 4/56, Solve 1 30/42 + 4/56 as a fraction

Add 72/42 and 4/56

1^st number: 1 30/42, 2^nd number: 4/56

72/42 + 4/56 is 25/14.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 42 × 4 = 168,
72/42 = 72 × 4/42 × 4 = 288/168
Likewise, for the 2nd fraction, since 56 × 3 = 168,
4/56 = 4 × 3/56 × 3 = 12/168
Add the two like fractions:
288/168 + 12/168 = 288 + 12/168 = 300/168
300/168 simplified gives 25/14
So, 72/42 + 4/56 = 25/14
In mixed form: 111/14

MathStep (Works offline)

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