Add 3/21 and 63/32, Solve 3/21 + 1 31/32 as a fraction

Add 3/21 and 63/32

1^st number: 3/21, 2^nd number: 1 31/32

3/21 + 63/32 is 473/224.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 21 × 32 = 672,
3/21 = 3 × 32/21 × 32 = 96/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
63/32 = 63 × 21/32 × 21 = 1323/672
Add the two like fractions:
96/672 + 1323/672 = 96 + 1323/672 = 1419/672
1419/672 simplified gives 473/224
So, 3/21 + 63/32 = 473/224
In mixed form: 225/224

MathStep (Works offline)

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