So the ratio 1:1 means that there are 32 cards of each colour (1 + 1 = 2, 64 ÷ 2 = 32). If we remove 8 red cards, there are then 24 red cards, and still 32 black cards. This ratio would be 24:32, which you can simplify to 12:16, then 6:8, and then 3:4, which is the final answer. I hope this helps!
