Subtract 8/80 from 4/21
4/21 - 8/80 is 19/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
4/21 = 4 × 80/21 × 80 = 320/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
8/80 = 8 × 21/80 × 21 = 168/1680 - Subtract the two like fractions:
320/1680 - 168/1680 = 320 - 168/1680 = 152/1680 - After reducing the fraction, the answer is 19/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-8/80 4/21-16/80 4/42-8/80 12/21-8/80 4/21-24/80 4/63-8/80 20/21-8/80 4/21-40/80 28/21-8/80 4/21-56/80