Subtract 54/90 from 81/75
1st number: 1 6/75, 2nd number: 54/90
81/75 - 54/90 is 12/25.
Steps for subtracting 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,
81/75 = 81 × 6/75 × 6 = 486/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
54/90 = 54 × 5/90 × 5 = 270/450 - Subtract the two like fractions:
486/450 - 270/450 = 486 - 270/450 = 216/450 - After reducing the fraction, the answer is 12/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: