Add 21/30 and 6/36
21/30 + 6/36 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 30 × 6 = 180,
21/30 = 21 × 6/30 × 6 = 126/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
6/36 = 6 × 5/36 × 5 = 30/180 - Add the two like fractions:
126/180 + 30/180 = 126 + 30/180 = 156/180 - 156/180 simplified gives 13/15
- So, 21/30 + 6/36 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+6/36 21/30+12/36 21/60+6/36 21/30+6/72 63/30+6/36 21/30+18/36 21/90+6/36 21/30+30/36 21/30+42/36