Subtract 42/40 from 16/63
1st number: 16/63, 2nd number: 1 2/40
16/63 - 42/40 is -1003/1260.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
16/63 = 16 × 40/63 × 40 = 640/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
42/40 = 42 × 63/40 × 63 = 2646/2520 - Subtract the two like fractions:
640/2520 - 2646/2520 = 640 - 2646/2520 = -2006/2520 - After reducing the fraction, the answer is -1003/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/63-42/40 16/63-84/40 16/63-42/80 48/63-42/40 80/63-42/40