Add 84/36 and 21/30
1st number: 2 12/36, 2nd number: 21/30
84/36 + 21/30 is 91/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 30 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
84/36 = 84 × 5/36 × 5 = 420/180 - Likewise, for the 2nd fraction, since 30 × 6 = 180,
21/30 = 21 × 6/30 × 6 = 126/180 - Add the two like fractions:
420/180 + 126/180 = 420 + 126/180 = 546/180 - 546/180 simplified gives 91/30
- So, 84/36 + 21/30 = 91/30
In mixed form: 31/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36+42/30 84/72+21/30 84/36+21/60 84/36+63/30 84/36+21/90