Add 63/42 and 25/10, Solve 1 21/42 + 2 5/10 as a fraction

Add 63/42 and 25/10

1^st number: 1 21/42, 2^nd number: 2 5/10

63/42 + 25/10 is 4/1.

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,
25/10 = 25 × 21/10 × 21 = 525/210
Add the two like fractions:
315/210 + 525/210 = 315 + 525/210 = 840/210
840/210 simplified gives 4/1
So, 63/42 + 25/10 = 4/1

MathStep (Works offline)

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