Subtract 21/30 from 4/63
4/63 - 21/30 is -401/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
4/63 = 4 × 10/63 × 10 = 40/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Subtract the two like fractions:
40/630 - 441/630 = 40 - 441/630 = -401/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/63-21/30 4/63-42/30 4/63-21/60 12/63-21/30 4/63-63/30 4/63-21/90 20/63-21/30 28/63-21/30