Add 81/90 and 25/75
81/90 + 25/75 is 37/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 75 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
81/90 = 81 × 5/90 × 5 = 405/450 - Likewise, for the 2nd fraction, since 75 × 6 = 450,
25/75 = 25 × 6/75 × 6 = 150/450 - Add the two like fractions:
405/450 + 150/450 = 405 + 150/450 = 555/450 - 555/450 simplified gives 37/30
- So, 81/90 + 25/75 = 37/30
In mixed form: 17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+50/75