In the questions below, determine the percentage error. Show your work on all problems. ** A dad holds five coins in his hand.

In the questions below, determine the percentage error. Show your work on all problems. 

** A dad holds five coins in his hand. He tells his son that if he can guess the amount of money he is holdingwithin 5% error he can have the money. The son guesses that he is holding 81 cents. The dad opens hishand and displays 90 cents. Did the son guess close enough to receive the money from his father?