Add 25/28 and 9/90
25/28 + 9/90 is 139/140.
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,
25/28 = 25 × 45/28 × 45 = 1125/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
9/90 = 9 × 14/90 × 14 = 126/1260 - Add the two like fractions:
1125/1260 + 126/1260 = 1125 + 126/1260 = 1251/1260 - 1251/1260 simplified gives 139/140
- So, 25/28 + 9/90 = 139/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+9/90 25/28+18/90 25/56+9/90 75/28+9/90 25/28+27/90 25/84+9/90 25/28+45/90 25/28+63/90