Add 20/5 and 63/42
1st number: 4 0/5, 2nd number: 1 21/42
20/5 + 63/42 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
20/5 = 20 × 42/5 × 42 = 840/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210 - Add the two like fractions:
840/210 + 315/210 = 840 + 315/210 = 1155/210 - 1155/210 simplified gives 11/2
- So, 20/5 + 63/42 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+63/42 20/10+63/42 20/5+63/84 60/5+63/42 20/15+63/42 20/25+63/42 20/35+63/42