Add 21/42 and 60/32, Solve 21/42 + 1 28/32 as a fraction

Add 21/42 and 60/32

1^st number: 21/42, 2^nd number: 1 28/32

21/42 + 60/32 is 19/8.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
21/42 = 21 × 16/42 × 16 = 336/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
60/32 = 60 × 21/32 × 21 = 1260/672
Add the two like fractions:
336/672 + 1260/672 = 336 + 1260/672 = 1596/672
1596/672 simplified gives 19/8
So, 21/42 + 60/32 = 19/8
In mixed form: 23/8

MathStep (Works offline)

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