Add 72/28 and 18/90
1st number: 2 16/28, 2nd number: 18/90
72/28 + 18/90 is 97/35.
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,
72/28 = 72 × 45/28 × 45 = 3240/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
18/90 = 18 × 14/90 × 14 = 252/1260 - Add the two like fractions:
3240/1260 + 252/1260 = 3240 + 252/1260 = 3492/1260 - 3492/1260 simplified gives 97/35
- So, 72/28 + 18/90 = 97/35
In mixed form: 227/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28+36/90 72/56+18/90 72/28+54/90 72/84+18/90