Add 32/28 and 5/21, Solve 1 4/28 + 5/21 as a fraction

Add 32/28 and 5/21

1^st number: 1 4/28, 2^nd number: 5/21

32/28 + 5/21 is 29/21.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 28 × 3 = 84,
32/28 = 32 × 3/28 × 3 = 96/84
Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84
Add the two like fractions:
96/84 + 20/84 = 96 + 20/84 = 116/84
116/84 simplified gives 29/21
So, 32/28 + 5/21 = 29/21
In mixed form: 18/21

MathStep (Works offline)

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