Subtract 20/42 from 4/63
4/63 - 20/42 is -26/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
4/63 = 4 × 2/63 × 2 = 8/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Subtract the two like fractions:
8/126 - 60/126 = 8 - 60/126 = -52/126 - After reducing the fraction, the answer is -26/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/63-20/42 4/63-40/42 4/63-20/84 12/63-20/42 4/63-60/42 20/63-20/42 28/63-20/42