Subtract 20/35 from 30/63
30/63 - 20/35 is -2/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
30/63 = 30 × 5/63 × 5 = 150/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
20/35 = 20 × 9/35 × 9 = 180/315 - Subtract the two like fractions:
150/315 - 180/315 = 150 - 180/315 = -30/315 - After reducing the fraction, the answer is -2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63-20/35 30/63-40/35 30/63-20/70 90/63-20/35 30/63-60/35