Add 8/90 and 21/15
1st number: 8/90, 2nd number: 1 6/15
8/90 + 21/15 is 67/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
21/15 = 21 × 6/15 × 6 = 126/90 - Add the two like fractions:
8/90 + 126/90 = 8 + 126/90 = 134/90 - 134/90 simplified gives 67/45
- So, 8/90 + 21/15 = 67/45
In mixed form: 122/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90+21/15 8/90+42/15 8/90+21/30 24/90+21/15 8/90+63/15 8/90+21/45 40/90+21/15 8/90+21/75 56/90+21/15