Subtract 18/45 from 90/15
1st number: 6 0/15, 2nd number: 18/45
90/15 - 18/45 is 28/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
90/15 = 90 × 3/15 × 3 = 270/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
18/45 = 18 × 1/45 × 1 = 18/45 - Subtract the two like fractions:
270/45 - 18/45 = 270 - 18/45 = 252/45 - After reducing the fraction, the answer is 28/5
- In mixed form: 53/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15-36/45 90/30-18/45 90/15-18/90 90/15-54/45 90/45-18/45 90/15-90/45 90/75-18/45