Subtract 40/63 from 42/75
42/75 - 40/63 is -118/1575.
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,
42/75 = 42 × 21/75 × 21 = 882/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
40/63 = 40 × 25/63 × 25 = 1000/1575 - Subtract the two like fractions:
882/1575 - 1000/1575 = 882 - 1000/1575 = -118/1575
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75-40/63 42/75-80/63