Subtract 25/45 from 18/63
18/63 - 25/45 is -17/63.
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,
18/63 = 18 × 5/63 × 5 = 90/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Subtract the two like fractions:
90/315 - 175/315 = 90 - 175/315 = -85/315 - After reducing the fraction, the answer is -17/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63-25/45 18/63-50/45 18/63-25/90 54/63-25/45 18/63-75/45 90/63-25/45