Add 5/21 and 70/75
5/21 + 70/75 is 41/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
5/21 = 5 × 25/21 × 25 = 125/525 - Likewise, for the 2nd fraction, since 75 × 7 = 525,
70/75 = 70 × 7/75 × 7 = 490/525 - Add the two like fractions:
125/525 + 490/525 = 125 + 490/525 = 615/525 - 615/525 simplified gives 41/35
- So, 5/21 + 70/75 = 41/35
In mixed form: 16/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+70/75 5/42+70/75 15/21+70/75 5/63+70/75 25/21+70/75 35/21+70/75