Alisha bought a collection of 500 old pennies. She chose 20 pennies from the collection and recorded their dates. Seven pennies had dates earlier than 1980.
What is the best estimate of the percent of pennies in Alisha’s collection that have dates earlier than 1980?
how about 7/20?
To find the best estimate of the percent of pennies in Alisha's collection that have dates earlier than 1980, we need to use the ratio of the number of pennies with dates earlier than 1980 to the total number of pennies chosen.
In this case, Alisha chose 20 pennies and out of those 20, 7 pennies had dates earlier than 1980. So the ratio is 7/20.
To find the percentage, we multiply the ratio by 100:
Percentage = (7/20) * 100
By simplifying the fraction, we get:
Percentage = 0.35 * 100
Therefore, the best estimate of the percent of pennies in Alisha's collection that have dates earlier than 1980 is 35%.