Subtract 42/40 from 14/28
1st number: 14/28, 2nd number: 1 2/40
14/28 - 42/40 is -11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
14/28 = 14 × 10/28 × 10 = 140/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Subtract the two like fractions:
140/280 - 294/280 = 140 - 294/280 = -154/280 - After reducing the fraction, the answer is -11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-84/40 14/56-42/40 14/28-42/80 42/28-42/40 14/84-42/40 70/28-42/40 98/28-42/40