Apackage of 25 wristbands costs $5.25 at this rate what is the cost of 1 wristband in dollars and cents

We know that for $5.25 we can get 25 wristbands. We can write this as:

(i.e. "Five dollars and twenty-five cents per twenty-five wristbands")

To get the cost of one writstband we need to simplify this fraction by division:

(i.e. "zero dollars and twenty-one cents per one wristband")

From this we see that 1 wristband costs $0.21 or 21cents.