Linda's grandmother baked brownies on Saturday for her church's bake sale. She cut each batch of brownies into 9 large pieces. She made 81 brownies before lunch and by the end of the day, she had made 153 brownies altogether. How many batches of brownies did she make after lunch?
if you want to figure out how much she made after lunch, subtract 153-81 to get that number. you get 72. Then, you can divide 72 into 9 pieces and you get 8. Hope this helps.