Subtract 5/14 from 21/40
21/40 - 5/14 is 47/280.
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,
21/40 = 21 × 7/40 × 7 = 147/280 - Likewise, for the 2nd fraction, since 14 × 20 = 280,
5/14 = 5 × 20/14 × 20 = 100/280 - Subtract the two like fractions:
147/280 - 100/280 = 147 - 100/280 = 47/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40-5/14 21/40-10/14 21/80-5/14 21/40-5/28 63/40-5/14 21/40-15/14 21/40-5/42 21/40-25/14 21/40-5/70 21/40-35/14 21/40-5/98