Add 72/75 and 81/90
72/75 + 81/90 is 93/50.
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,
72/75 = 72 × 6/75 × 6 = 432/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
81/90 = 81 × 5/90 × 5 = 405/450 - Add the two like fractions:
432/450 + 405/450 = 432 + 405/450 = 837/450 - 837/450 simplified gives 93/50
- So, 72/75 + 81/90 = 93/50
In mixed form: 143/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: