Add 36/28 and 81/90
1st number: 1 8/28, 2nd number: 81/90
36/28 + 81/90 is 153/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
36/28 = 36 × 45/28 × 45 = 1620/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
81/90 = 81 × 14/90 × 14 = 1134/1260 - Add the two like fractions:
1620/1260 + 1134/1260 = 1620 + 1134/1260 = 2754/1260 - 2754/1260 simplified gives 153/70
- So, 36/28 + 81/90 = 153/70
In mixed form: 213/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28+81/90 36/56+81/90 36/84+81/90