Add 3/28 and 80/90
3/28 + 80/90 is 251/252.
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,
3/28 = 3 × 45/28 × 45 = 135/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
80/90 = 80 × 14/90 × 14 = 1120/1260 - Add the two like fractions:
135/1260 + 1120/1260 = 135 + 1120/1260 = 1255/1260 - 1255/1260 simplified gives 251/252
- So, 3/28 + 80/90 = 251/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28+80/90 3/56+80/90 9/28+80/90 3/84+80/90 15/28+80/90 21/28+80/90