If you know that 84 is 70% of the whole, explain how you can use proportional reasoning to determine the whole. Use the drop-down menus to explain your answer. If you know that 84 is 70% of the whole, explain how you can use proportional reasoning to determine the whole. Use the drop-down menus to explain your answer. If you know that 84 is 70% of the whole, explain how you can use proportional reasoning to determine the whole. Use the drop-down menus to explain your answer. If you know that 84 is 70% of the whole, explain how you can use proportional reasoning to determine the whole. Use the drop-down menus to explain your answer. If you know that 84 is 70% of the whole, explain how you can use proportional reasoning to determine the whole. Use the drop-down menus to explain your answer.