Add 21/20 and 7/36
1st number: 1 1/20, 2nd number: 7/36
21/20 + 7/36 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
7/36 = 7 × 5/36 × 5 = 35/180 - Add the two like fractions:
189/180 + 35/180 = 189 + 35/180 = 224/180 - 224/180 simplified gives 56/45
- So, 21/20 + 7/36 = 56/45
In mixed form: 111/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+7/36 21/20+14/36 21/40+7/36 21/20+7/72 63/20+7/36 21/20+21/36 21/60+7/36 21/20+35/36 21/20+49/36