Subtract 20/40 from 14/84
14/84 - 20/40 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
14/84 = 14 × 10/84 × 10 = 140/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
20/40 = 20 × 21/40 × 21 = 420/840 - Subtract the two like fractions:
140/840 - 420/840 = 140 - 420/840 = -280/840 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/84-20/40 14/84-20/80 42/84-20/40 14/84-60/40 70/84-20/40 98/84-20/40