Add 30/80 and 21/36
30/80 + 21/36 is 23/24.
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,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
21/36 = 21 × 20/36 × 20 = 420/720 - Add the two like fractions:
270/720 + 420/720 = 270 + 420/720 = 690/720 - 690/720 simplified gives 23/24
- So, 30/80 + 21/36 = 23/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+21/36 30/80+42/36 30/80+21/72 90/80+21/36 30/80+63/36