Subtract 30/63 from 3/20
3/20 - 30/63 is -137/420.
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,
3/20 = 3 × 63/20 × 63 = 189/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
30/63 = 30 × 20/63 × 20 = 600/1260 - Subtract the two like fractions:
189/1260 - 600/1260 = 189 - 600/1260 = -411/1260 - After reducing the fraction, the answer is -137/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-30/63 3/20-60/63 3/40-30/63 9/20-30/63 3/20-90/63 3/60-30/63 15/20-30/63 21/20-30/63