Add 42/72 and 63/4, Solve 42/72 + 15 3/4 as a fraction

Add 42/72 and 63/4

1^st number: 42/72, 2^nd number: 15 3/4

42/72 + 63/4 is 49/3.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 4 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72
Likewise, for the 2nd fraction, since 4 × 18 = 72,
63/4 = 63 × 18/4 × 18 = 1134/72
Add the two like fractions:
42/72 + 1134/72 = 42 + 1134/72 = 1176/72
1176/72 simplified gives 49/3
So, 42/72 + 63/4 = 49/3
In mixed form: 161/3

MathStep (Works offline)

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