Add 75/15 and 21/8
1st number: 5 0/15, 2nd number: 2 5/8
75/15 + 21/8 is 61/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
75/15 = 75 × 8/15 × 8 = 600/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Add the two like fractions:
600/120 + 315/120 = 600 + 315/120 = 915/120 - 915/120 simplified gives 61/8
- So, 75/15 + 21/8 = 61/8
In mixed form: 75/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/15+42/8 75/30+21/8 75/15+21/16 75/15+63/8 75/45+21/8 75/15+21/24 75/15+21/40 75/15+21/56