Add 45/15 and 81/72
1st number: 3 0/15, 2nd number: 1 9/72
45/15 + 81/72 is 33/8.
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,
81/72 = 81 × 5/72 × 5 = 405/360 - Add the two like fractions:
1080/360 + 405/360 = 1080 + 405/360 = 1485/360 - 1485/360 simplified gives 33/8
- So, 45/15 + 81/72 = 33/8
In mixed form: 41/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+81/72 45/30+81/72 45/75+81/72