Add 7/90 and 21/16
1st number: 7/90, 2nd number: 1 5/16
7/90 + 21/16 is 1001/720.
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,
7/90 = 7 × 8/90 × 8 = 56/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720 - Add the two like fractions:
56/720 + 945/720 = 56 + 945/720 = 1001/720 - So, 7/90 + 21/16 = 1001/720
In mixed form: 1281/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+21/16 7/90+42/16 7/90+21/32 21/90+21/16 7/90+63/16 7/90+21/48 35/90+21/16 7/90+21/80 49/90+21/16