Subtract 10/80 from 20/84
20/84 - 10/80 is 19/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
20/84 = 20 × 20/84 × 20 = 400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Subtract the two like fractions:
400/1680 - 210/1680 = 400 - 210/1680 = 190/1680 - After reducing the fraction, the answer is 19/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84-10/80 20/84-20/80 60/84-10/80 20/84-30/80 20/84-50/80 20/84-70/80