Subtract 18/45 from 90/63
1st number: 1 27/63, 2nd number: 18/45
90/63 - 18/45 is 36/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
90/63 = 90 × 5/63 × 5 = 450/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
18/45 = 18 × 7/45 × 7 = 126/315 - Subtract the two like fractions:
450/315 - 126/315 = 450 - 126/315 = 324/315 - After reducing the fraction, the answer is 36/35
- In mixed form: 11/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-36/45 90/63-18/90 90/63-54/45 90/63-90/45