Subtract 18/20 from 9/63
9/63 - 18/20 is -53/70.
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,
9/63 = 9 × 20/63 × 20 = 180/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Subtract the two like fractions:
180/1260 - 1134/1260 = 180 - 1134/1260 = -954/1260 - After reducing the fraction, the answer is -53/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/63-18/20 9/63-36/20 9/63-18/40 27/63-18/20 9/63-54/20 9/63-18/60 45/63-18/20 9/63-90/20