Add 72/40 and 15/7
1st number: 1 32/40, 2nd number: 2 1/7
72/40 + 15/7 is 138/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
72/40 = 72 × 7/40 × 7 = 504/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
15/7 = 15 × 40/7 × 40 = 600/280 - Add the two like fractions:
504/280 + 600/280 = 504 + 600/280 = 1104/280 - 1104/280 simplified gives 138/35
- So, 72/40 + 15/7 = 138/35
In mixed form: 333/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+30/7 72/80+15/7 72/40+15/14 72/40+45/7 72/40+15/21 72/40+75/7 72/40+15/35 72/40+15/49