Add 6/20 and 15/90
6/20 + 15/90 is 7/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
6/20 = 6 × 9/20 × 9 = 54/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Add the two like fractions:
54/180 + 30/180 = 54 + 30/180 = 84/180 - 84/180 simplified gives 7/15
- So, 6/20 + 15/90 = 7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+15/90 6/20+30/90 6/40+15/90 18/20+15/90 6/20+45/90 6/60+15/90 30/20+15/90 6/20+75/90 42/20+15/90