Subtract 30/63 from 7/20
7/20 - 30/63 is -53/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
7/20 = 7 × 63/20 × 63 = 441/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
30/63 = 30 × 20/63 × 20 = 600/1260 - Subtract the two like fractions:
441/1260 - 600/1260 = 441 - 600/1260 = -159/1260 - After reducing the fraction, the answer is -53/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-30/63 7/20-60/63 7/40-30/63 21/20-30/63 7/20-90/63 7/60-30/63 35/20-30/63 49/20-30/63