Question

There 64 cards in a pack. Each card is white red or black. The ratio of the number of red cards to the number of black cards is 1:1. 8 red cards are removed from the pack. Find the ratio of the number of red cards now in the pack to the number of black cards now in the pack. Give your answer in its simplest form

Answer 1

3:4
32:32 to begin with 
24:32, which can be simplified by dividing both sides by 8.