Add 5/90 and 15/20
5/90 + 15/20 is 29/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
5/90 = 5 × 2/90 × 2 = 10/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Add the two like fractions:
10/180 + 135/180 = 10 + 135/180 = 145/180 - 145/180 simplified gives 29/36
- So, 5/90 + 15/20 = 29/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+15/20 5/90+30/20 5/90+15/40 15/90+15/20 5/90+45/20 5/90+15/60 25/90+15/20 5/90+75/20 35/90+15/20