Add 81/72 and 70/15
1st number: 1 9/72, 2nd number: 4 10/15
81/72 + 70/15 is 139/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 15 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
81/72 = 81 × 5/72 × 5 = 405/360 - Likewise, for the 2nd fraction, since 15 × 24 = 360,
70/15 = 70 × 24/15 × 24 = 1680/360 - Add the two like fractions:
405/360 + 1680/360 = 405 + 1680/360 = 2085/360 - 2085/360 simplified gives 139/24
- So, 81/72 + 70/15 = 139/24
In mixed form: 519/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72+70/30 81/72+70/45 81/72+70/75