Add 36/18 and 84/21
1st number: 2 0/18, 2nd number: 4 0/21
36/18 + 84/21 is 6/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
36/18 = 36 × 7/18 × 7 = 252/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
84/21 = 84 × 6/21 × 6 = 504/126 - Add the two like fractions:
252/126 + 504/126 = 252 + 504/126 = 756/126 - 756/126 simplified gives 6/1
- So, 36/18 + 84/21 = 6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+84/21 36/18+84/42 36/54+84/21 36/18+84/63 36/90+84/21