Add 72/40 and 7/28
1st number: 1 32/40, 2nd number: 7/28
72/40 + 7/28 is 41/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 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 28 × 10 = 280,
7/28 = 7 × 10/28 × 10 = 70/280 - Add the two like fractions:
504/280 + 70/280 = 504 + 70/280 = 574/280 - 574/280 simplified gives 41/20
- So, 72/40 + 7/28 = 41/20
In mixed form: 21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+14/28 72/80+7/28 72/40+7/56 72/40+21/28 72/40+7/84 72/40+35/28 72/40+49/28