Add 21/45 and 6/36
21/45 + 6/36 is 19/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
21/45 = 21 × 4/45 × 4 = 84/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
6/36 = 6 × 5/36 × 5 = 30/180 - Add the two like fractions:
84/180 + 30/180 = 84 + 30/180 = 114/180 - 114/180 simplified gives 19/30
- So, 21/45 + 6/36 = 19/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+6/36 21/45+12/36 21/90+6/36 21/45+6/72 63/45+6/36 21/45+18/36 21/45+30/36 21/45+42/36