Add 14/40 and 21/72
14/40 + 21/72 is 77/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
14/40 = 14 × 9/40 × 9 = 126/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
126/360 + 105/360 = 126 + 105/360 = 231/360 - 231/360 simplified gives 77/120
- So, 14/40 + 21/72 = 77/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/40+21/72 14/40+42/72 14/80+21/72 42/40+21/72 14/40+63/72 70/40+21/72 98/40+21/72