Add 21/5 and 21/56
1st number: 4 1/5, 2nd number: 21/56
21/5 + 21/56 is 183/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 5 × 56 = 280,
21/5 = 21 × 56/5 × 56 = 1176/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Add the two like fractions:
1176/280 + 105/280 = 1176 + 105/280 = 1281/280 - 1281/280 simplified gives 183/40
- So, 21/5 + 21/56 = 183/40
In mixed form: 423/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+21/56 21/5+42/56 21/10+21/56 63/5+21/56 21/5+63/56 21/15+21/56 21/25+21/56 21/35+21/56