Add 40/36 and 21/90
1st number: 1 4/36, 2nd number: 21/90
40/36 + 21/90 is 121/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
40/36 = 40 × 5/36 × 5 = 200/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Add the two like fractions:
200/180 + 42/180 = 200 + 42/180 = 242/180 - 242/180 simplified gives 121/90
- So, 40/36 + 21/90 = 121/90
In mixed form: 131/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/36+21/90 40/36+42/90 40/72+21/90 40/36+63/90