I had a total of 80 pieces of 20¢ coins or 50¢ coins in a box. I used 50% of 20¢ coins and 25% of 50¢ coins to buy a book and had 46 coins left. (a) Find the percentage of the number of 20¢ coins at first. (b) Find the cost of the book.

apsiganocj Aug 5, 2021