Add 70/75 and 75/90
70/75 + 75/90 is 53/30.
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,
70/75 = 70 × 6/75 × 6 = 420/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
75/90 = 75 × 5/90 × 5 = 375/450 - Add the two like fractions:
420/450 + 375/450 = 420 + 375/450 = 795/450 - 795/450 simplified gives 53/30
- So, 70/75 + 75/90 = 53/30
In mixed form: 123/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: