Add 36/84 and 81/30
1st number: 36/84, 2nd number: 2 21/30
36/84 + 81/30 is 219/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
36/84 = 36 × 5/84 × 5 = 180/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
81/30 = 81 × 14/30 × 14 = 1134/420 - Add the two like fractions:
180/420 + 1134/420 = 180 + 1134/420 = 1314/420 - 1314/420 simplified gives 219/70
- So, 36/84 + 81/30 = 219/70
In mixed form: 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+81/30 36/84+81/60 36/84+81/90