Subtract 18/63 from 15/75
15/75 - 18/63 is -3/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 63 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 75 × 21 = 1575,
15/75 = 15 × 21/75 × 21 = 315/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
18/63 = 18 × 25/63 × 25 = 450/1575 - Subtract the two like fractions:
315/1575 - 450/1575 = 315 - 450/1575 = -135/1575 - After reducing the fraction, the answer is -3/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75-18/63 15/75-36/63 45/75-18/63 15/75-54/63 15/75-90/63