Add 80/21 and 9/35
1st number: 3 17/21, 2nd number: 9/35
80/21 + 9/35 is 61/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
80/21 = 80 × 5/21 × 5 = 400/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
9/35 = 9 × 3/35 × 3 = 27/105 - Add the two like fractions:
400/105 + 27/105 = 400 + 27/105 = 427/105 - 427/105 simplified gives 61/15
- So, 80/21 + 9/35 = 61/15
In mixed form: 41/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+18/35 80/42+9/35 80/21+9/70 80/21+27/35 80/63+9/35 80/21+45/35 80/21+63/35