Thank you green belt for ur wonderful explanation! Tks a lot

Thanks a lot for ur explanation.

Andy, George and Dim agreed to buy present together. Andy agreed to contribute 30% of the cost of the present. George agreed to contribute 2/5. The balance will be paid by Dim. However, when they went to the shop, the cost of the present increased by 25%. As a result, Andy paid $84. a. What is the original price of the present

b. HOw much did Dim had to pay at the end?