At Frugal Foods a loaf of bread cost about $1 in 1980. In 2013, the loaf of bread cost $2.50.

A ratio is a comparison of two amounts by division. What is the ratio of the cost of a loaf of bread in 2013 to the cost in 1980?

Assuming the price of clothing increased at the same rate, if the cost of jeans at Cobb’s Corner was $15 in 1980, what would the cost of the jeans be in 2013?

Can you explain both in detail im confused

the ratio is 2.50/1.00 = 5/2

If jeans grew by the same factor, then their price was
15 * 2.5 = 37.50