Add 15/5 and 21/72
1st number: 3 0/5, 2nd number: 21/72
15/5 + 21/72 is 79/24.
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,
15/5 = 15 × 72/5 × 72 = 1080/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
1080/360 + 105/360 = 1080 + 105/360 = 1185/360 - 1185/360 simplified gives 79/24
- So, 15/5 + 21/72 = 79/24
In mixed form: 37/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+21/72 15/5+42/72 15/10+21/72 45/5+21/72 15/5+63/72 75/5+21/72 15/25+21/72 15/35+21/72