Subtract 20/63 from 16/45
16/45 - 20/63 is 4/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
16/45 = 16 × 7/45 × 7 = 112/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
20/63 = 20 × 5/63 × 5 = 100/315 - Subtract the two like fractions:
112/315 - 100/315 = 112 - 100/315 = 12/315 - After reducing the fraction, the answer is 4/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/45-20/63 16/45-40/63 16/90-20/63 48/45-20/63 16/45-60/63 80/45-20/63