Add 15/90 and 20/28
15/90 + 20/28 is 37/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
15/90 = 15 × 14/90 × 14 = 210/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
20/28 = 20 × 45/28 × 45 = 900/1260 - Add the two like fractions:
210/1260 + 900/1260 = 210 + 900/1260 = 1110/1260 - 1110/1260 simplified gives 37/42
- So, 15/90 + 20/28 = 37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+20/28 15/90+40/28 15/90+20/56 45/90+20/28 15/90+60/28 15/90+20/84 75/90+20/28