Add 36/60 and 84/21
1st number: 36/60, 2nd number: 4 0/21
36/60 + 84/21 is 23/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
36/60 = 36 × 7/60 × 7 = 252/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
84/21 = 84 × 20/21 × 20 = 1680/420 - Add the two like fractions:
252/420 + 1680/420 = 252 + 1680/420 = 1932/420 - 1932/420 simplified gives 23/5
- So, 36/60 + 84/21 = 23/5
In mixed form: 43/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/60+84/21 36/60+84/42 36/60+84/63