Add 63/42 and 32/10, Solve 1 21/42 + 3 2/10 as a fraction

Add 63/42 and 32/10

1^st number: 1 21/42, 2^nd number: 3 2/10

63/42 + 32/10 is 47/10.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210
Likewise, for the 2nd fraction, since 10 × 21 = 210,
32/10 = 32 × 21/10 × 21 = 672/210
Add the two like fractions:
315/210 + 672/210 = 315 + 672/210 = 987/210
987/210 simplified gives 47/10
So, 63/42 + 32/10 = 47/10
In mixed form: 47/10

MathStep (Works offline)

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