Blake has a collectors' card that he bought for $42.00. the card is now worth $87.00. what is the percent of change in the value of the card? round answers to the nearest percent.

Cameron made 1 loaf of bread. his family ate 4/6 of the loaf of bread. how much of the loaf of bread remains? /

Find the commission on a $590.00 sale if the commission is 15%.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *