Add 25/21 and 16/15
1st number: 1 4/21, 2nd number: 1 1/15
25/21 + 16/15 is 79/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
25/21 = 25 × 5/21 × 5 = 125/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
16/15 = 16 × 7/15 × 7 = 112/105 - Add the two like fractions:
125/105 + 112/105 = 125 + 112/105 = 237/105 - 237/105 simplified gives 79/35
- So, 25/21 + 16/15 = 79/35
In mixed form: 29/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+16/15 25/21+32/15 25/42+16/15 25/21+16/30 75/21+16/15 25/21+48/15 25/63+16/15 25/21+16/45 25/21+80/15 25/21+16/75