Proportions, Ratios and Percents

What percent of 50 is 20?

What percent of 32 is 10?

In the fruit bowl there are 4 apples, 2 bananas, and 5 pears.  What is the ratio of pears to ALL fruit?

In a class, the ratio of boys to girls is 6:5. If there are 18 boys, how many girls are there?

Write how to find the proportion of

2:8 :: 25:625

(Do not give space first right the means than the extremes.)

What is 19% of 50?

75% of what number is 48?

A 16 ounce bottle of fruit punch costs $2.40.  A 24 ounce bottle of fruit punch costs $3.84.  Which size costs less per ounce?

In the Central City Grand Prix, out of 30 cars that started the race, 12 of them finished. What percent of the cars did not finish the race?