Subtract 63/40 from 6/42
1st number: 6/42, 2nd number: 1 23/40
6/42 - 63/40 is -401/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
6/42 = 6 × 20/42 × 20 = 120/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
63/40 = 63 × 21/40 × 21 = 1323/840 - Subtract the two like fractions:
120/840 - 1323/840 = 120 - 1323/840 = -1203/840 - After reducing the fraction, the answer is -401/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-63/40 6/84-63/40 6/42-63/80 18/42-63/40 30/42-63/40