Add 35/75 and 21/90
35/75 + 21/90 is 7/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
35/75 = 35 × 6/75 × 6 = 210/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Add the two like fractions:
210/450 + 105/450 = 210 + 105/450 = 315/450 - 315/450 simplified gives 7/10
- So, 35/75 + 21/90 = 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/75+21/90 35/75+42/90 35/75+63/90