Add 9/21 and 40/25
1st number: 9/21, 2nd number: 1 15/25
9/21 + 40/25 is 71/35.
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,
40/25 = 40 × 21/25 × 21 = 840/525 - Add the two like fractions:
225/525 + 840/525 = 225 + 840/525 = 1065/525 - 1065/525 simplified gives 71/35
- So, 9/21 + 40/25 = 71/35
In mixed form: 21/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+40/25 9/21+80/25 9/42+40/25 9/21+40/50 27/21+40/25 9/63+40/25 9/21+40/75 45/21+40/25 63/21+40/25