Add 20/2 and 21/7
1st number: 10 0/2, 2nd number: 3 0/7
20/2 + 21/7 is 13/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
20/2 = 20 × 7/2 × 7 = 140/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
21/7 = 21 × 2/7 × 2 = 42/14 - Add the two like fractions:
140/14 + 42/14 = 140 + 42/14 = 182/14 - 182/14 simplified gives 13/1
- So, 20/2 + 21/7 = 13/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2+21/7 20/2+42/7 20/4+21/7 20/2+21/14 60/2+21/7 20/2+63/7 20/6+21/7 20/10+21/7 20/2+21/35 20/14+21/7 20/2+21/49