Add 7/72 and 21/8
1st number: 7/72, 2nd number: 2 5/8
7/72 + 21/8 is 49/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
7/72 = 7 × 1/72 × 1 = 7/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Add the two like fractions:
7/72 + 189/72 = 7 + 189/72 = 196/72 - 196/72 simplified gives 49/18
- So, 7/72 + 21/8 = 49/18
In mixed form: 213/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72+21/8 7/72+42/8 7/72+21/16 21/72+21/8 7/72+63/8 7/72+21/24 35/72+21/8 7/72+21/40 49/72+21/8 7/72+21/56