Add 45/15 and 21/72
1st number: 3 0/15, 2nd number: 21/72
45/15 + 21/72 is 79/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
45/15 = 45 × 24/15 × 24 = 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, 45/15 + 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: 90/15+21/72 45/15+42/72 45/30+21/72 45/15+63/72 45/75+21/72