Add 56/21 and 70/25
1st number: 2 14/21, 2nd number: 2 20/25
56/21 + 70/25 is 82/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
56/21 = 56 × 25/21 × 25 = 1400/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
70/25 = 70 × 21/25 × 21 = 1470/525 - Add the two like fractions:
1400/525 + 1470/525 = 1400 + 1470/525 = 2870/525 - 2870/525 simplified gives 82/15
- So, 56/21 + 70/25 = 82/15
In mixed form: 57/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+70/25 56/21+70/50 56/63+70/25 56/21+70/75