Subtract 4/40 from 18/63
18/63 - 4/40 is 13/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
18/63 = 18 × 40/63 × 40 = 720/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
4/40 = 4 × 63/40 × 63 = 252/2520 - Subtract the two like fractions:
720/2520 - 252/2520 = 720 - 252/2520 = 468/2520 - After reducing the fraction, the answer is 13/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63-4/40 18/63-8/40 18/63-4/80 54/63-4/40 18/63-12/40 90/63-4/40 18/63-20/40 18/63-28/40