Add 81/72 and 56/90
1st number: 1 9/72, 2nd number: 56/90
81/72 + 56/90 is 629/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 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 90 × 4 = 360,
56/90 = 56 × 4/90 × 4 = 224/360 - Add the two like fractions:
405/360 + 224/360 = 405 + 224/360 = 629/360 - So, 81/72 + 56/90 = 629/360
In mixed form: 1269/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: