Add 72/36 and 98/21
1st number: 2 0/36, 2nd number: 4 14/21
72/36 + 98/21 is 20/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
72/36 = 72 × 7/36 × 7 = 504/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
98/21 = 98 × 12/21 × 12 = 1176/252 - Add the two like fractions:
504/252 + 1176/252 = 504 + 1176/252 = 1680/252 - 1680/252 simplified gives 20/3
- So, 72/36 + 98/21 = 20/3
In mixed form: 62/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/36+98/42 72/36+98/63