Add 27/28 and 5/90
27/28 + 5/90 is 257/252.
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,
27/28 = 27 × 45/28 × 45 = 1215/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
5/90 = 5 × 14/90 × 14 = 70/1260 - Add the two like fractions:
1215/1260 + 70/1260 = 1215 + 70/1260 = 1285/1260 - 1285/1260 simplified gives 257/252
- So, 27/28 + 5/90 = 257/252
In mixed form: 15/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28+5/90 27/28+10/90 27/56+5/90 81/28+5/90 27/28+15/90 27/84+5/90 27/28+25/90 27/28+35/90