Add 72/28 and 56/42
1st number: 2 16/28, 2nd number: 1 14/42
72/28 + 56/42 is 82/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
56/42 = 56 × 2/42 × 2 = 112/84 - Add the two like fractions:
216/84 + 112/84 = 216 + 112/84 = 328/84 - 328/84 simplified gives 82/21
- So, 72/28 + 56/42 = 82/21
In mixed form: 319/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/56+56/42 72/28+56/84 72/84+56/42