Add 2/5 and 21/72
2/5 + 21/72 is 83/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
2/5 = 2 × 72/5 × 72 = 144/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
144/360 + 105/360 = 144 + 105/360 = 249/360 - 249/360 simplified gives 83/120
- So, 2/5 + 21/72 = 83/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5+21/72 2/5+42/72 2/10+21/72 6/5+21/72 2/5+63/72 2/15+21/72 10/5+21/72 2/25+21/72 14/5+21/72 2/35+21/72