Subtract 90/54 from 72/15
1st number: 4 12/15, 2nd number: 1 36/54
72/15 - 90/54 is 47/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
72/15 = 72 × 18/15 × 18 = 1296/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
90/54 = 90 × 5/54 × 5 = 450/270 - Subtract the two like fractions:
1296/270 - 450/270 = 1296 - 450/270 = 846/270 - After reducing the fraction, the answer is 47/15
- In mixed form: 32/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30-90/54 72/45-90/54 72/75-90/54