Subtract 10/20 from 30/63
30/63 - 10/20 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
30/63 = 30 × 20/63 × 20 = 600/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
10/20 = 10 × 63/20 × 63 = 630/1260 - Subtract the two like fractions:
600/1260 - 630/1260 = 600 - 630/1260 = -30/1260 - After reducing the fraction, the answer is -1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63-10/20 30/63-10/40 90/63-10/20 30/63-30/20 30/63-10/60 30/63-50/20 30/63-70/20