Answer:
c
Step-by-step explanation:
So,
To find the percentage that the copper comprises, just divide the amount of copper by the total amount of metal in the coin. In this case, we will change the denominator so that it is 100, which can easily be converted into a percentage, which is really just a fraction out of 100.

75%
75% of the metal in the coin is copper.
150 miles at a rate of 60 miles per hour. 150/60=2.5 hours
He figures that it will take 25 hours. Wrong
2 out of 8 people sharing the prize is 2/8 or 25% of the people sharing the prize