Subtract 2/80 from 1/84
1/84 - 2/80 is -11/840.
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,
1/84 = 1 × 20/84 × 20 = 20/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
2/80 = 2 × 21/80 × 21 = 42/1680 - Subtract the two like fractions:
20/1680 - 42/1680 = 20 - 42/1680 = -22/1680 - After reducing the fraction, the answer is -11/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84-2/80 1/84-4/80 3/84-2/80 1/84-6/80 5/84-2/80 1/84-10/80 7/84-2/80 1/84-14/80