Add 56/90 and 21/16
1st number: 56/90, 2nd number: 1 5/16
56/90 + 21/16 is 1393/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
56/90 = 56 × 8/90 × 8 = 448/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720 - Add the two like fractions:
448/720 + 945/720 = 448 + 945/720 = 1393/720 - So, 56/90 + 21/16 = 1393/720
In mixed form: 1673/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+42/16 56/90+21/32 56/90+63/16 56/90+21/48 56/90+21/80