Subtract 63/14 from 18/40
1st number: 18/40, 2nd number: 4 7/14
18/40 - 63/14 is -81/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 14 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Likewise, for the 2nd fraction, since 14 × 20 = 280,
63/14 = 63 × 20/14 × 20 = 1260/280 - Subtract the two like fractions:
126/280 - 1260/280 = 126 - 1260/280 = -1134/280 - After reducing the fraction, the answer is -81/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-63/14 18/80-63/14 18/40-63/28 54/40-63/14 18/40-63/42 90/40-63/14 18/40-63/70 18/40-63/98