Add 21/80 and 49/36
1st number: 21/80, 2nd number: 1 13/36
21/80 + 49/36 is 1169/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
49/36 = 49 × 20/36 × 20 = 980/720 - Add the two like fractions:
189/720 + 980/720 = 189 + 980/720 = 1169/720 - So, 21/80 + 49/36 = 1169/720
In mixed form: 1449/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+49/36 21/80+98/36 21/80+49/72 63/80+49/36