Add 18/10 and 21/56
1st number: 1 8/10, 2nd number: 21/56
18/10 + 21/56 is 87/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 10 × 28 = 280,
18/10 = 18 × 28/10 × 28 = 504/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Add the two like fractions:
504/280 + 105/280 = 504 + 105/280 = 609/280 - 609/280 simplified gives 87/40
- So, 18/10 + 21/56 = 87/40
In mixed form: 27/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10+21/56 18/10+42/56 18/20+21/56 54/10+21/56 18/10+63/56 18/30+21/56 90/10+21/56 18/50+21/56 18/70+21/56