Subtract 14/40 from 6/21
6/21 - 14/40 is -9/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
6/21 = 6 × 40/21 × 40 = 240/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
14/40 = 14 × 21/40 × 21 = 294/840 - Subtract the two like fractions:
240/840 - 294/840 = 240 - 294/840 = -54/840 - After reducing the fraction, the answer is -9/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-14/40 6/21-28/40 6/42-14/40 6/21-14/80 18/21-14/40 6/21-42/40 6/63-14/40 30/21-14/40 6/21-70/40 42/21-14/40 6/21-98/40