Subtract 4/84 from 84/80
1st number: 1 4/80, 2nd number: 4/84
84/80 - 4/84 is 421/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
4/84 = 4 × 20/84 × 20 = 80/1680 - Subtract the two like fractions:
1764/1680 - 80/1680 = 1764 - 80/1680 = 1684/1680 - After reducing the fraction, the answer is 421/420
- In mixed form: 11/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-8/84 84/80-12/84 84/80-20/84 84/80-28/84