Add 72/36 and 40/42
1st number: 2 0/36, 2nd number: 40/42
72/36 + 40/42 is 62/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 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 42 × 6 = 252,
40/42 = 40 × 6/42 × 6 = 240/252 - Add the two like fractions:
504/252 + 240/252 = 504 + 240/252 = 744/252 - 744/252 simplified gives 62/21
- So, 72/36 + 40/42 = 62/21
In mixed form: 220/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/36+80/42 72/36+40/84