Add 9/21 and 70/25
1st number: 9/21, 2nd number: 2 20/25
9/21 + 70/25 is 113/35.
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,
9/21 = 9 × 25/21 × 25 = 225/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
70/25 = 70 × 21/25 × 21 = 1470/525 - Add the two like fractions:
225/525 + 1470/525 = 225 + 1470/525 = 1695/525 - 1695/525 simplified gives 113/35
- So, 9/21 + 70/25 = 113/35
In mixed form: 38/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+70/25 9/42+70/25 9/21+70/50 27/21+70/25 9/63+70/25 9/21+70/75 45/21+70/25 63/21+70/25