Subtract 42/10 from 63/40
1st number: 1 23/40, 2nd number: 4 2/10
63/40 - 42/10 is -21/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
63/40 = 63 × 1/40 × 1 = 63/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
42/10 = 42 × 4/10 × 4 = 168/40 - Subtract the two like fractions:
63/40 - 168/40 = 63 - 168/40 = -105/40 - After reducing the fraction, the answer is -21/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/40-84/10 63/80-42/10 63/40-42/20 63/40-42/30 63/40-42/50 63/40-42/70