Subtract 24/40 from 63/42
1st number: 1 21/42, 2nd number: 24/40
63/42 - 24/40 is 9/10.
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,
63/42 = 63 × 20/42 × 20 = 1260/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
24/40 = 24 × 21/40 × 21 = 504/840 - Subtract the two like fractions:
1260/840 - 504/840 = 1260 - 504/840 = 756/840 - After reducing the fraction, the answer is 9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-48/40 63/84-24/40 63/42-24/80 63/42-72/40