Missing Percent

What percent is 30 of 50?

60 is what percent of 80?

What percent of 70 is 28?

What percent is 16 of 80?

91 is what percent of 182?

What percent of 50 is 27?

63 is what percent of 84?

What percent is 9 of 180?

What percent of 40 is 26?

28 is what percent of 140?