Add 30/36 and 21/80
30/36 + 21/80 is 263/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 36 × 20 = 720,
30/36 = 30 × 20/36 × 20 = 600/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Add the two like fractions:
600/720 + 189/720 = 600 + 189/720 = 789/720 - 789/720 simplified gives 263/240
- So, 30/36 + 21/80 = 263/240
In mixed form: 123/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/36+21/80 30/36+42/80 30/72+21/80 90/36+21/80 30/36+63/80