Subtract 90/15 from 63/45
1st number: 1 18/45, 2nd number: 6 0/15
63/45 - 90/15 is -23/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
63/45 = 63 × 1/45 × 1 = 63/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
90/15 = 90 × 3/15 × 3 = 270/45 - Subtract the two like fractions:
63/45 - 270/45 = 63 - 270/45 = -207/45 - After reducing the fraction, the answer is -23/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/90-90/15 63/45-90/30 63/45-90/45 63/45-90/75