Add 40/48 and 21/72
40/48 + 21/72 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 72 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 48 × 3 = 144,
40/48 = 40 × 3/48 × 3 = 120/144 - Likewise, for the 2nd fraction, since 72 × 2 = 144,
21/72 = 21 × 2/72 × 2 = 42/144 - Add the two like fractions:
120/144 + 42/144 = 120 + 42/144 = 162/144 - 162/144 simplified gives 9/8
- So, 40/48 + 21/72 = 9/8
In mixed form: 11/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/48+21/72 40/48+42/72 40/96+21/72 40/48+63/72