Four cups of pure water are added to a 20-cup bowl of punch that is 75% juice. what percentage of the new punch is juice?

original
added
new
amount of juice
15 cups
0

amount of punch
20 cups
4 cups

27%
37.5%
62.5%
75%

Amount of juice: 15 cups

Amount of punch: initial - 20 cups, final - 24 cups

Percentage: 62.5%

Step-by-step explanation:

20-cup bowl of punch contains 75% juice. Let x cups be the amount of juice, then

20 cups - 100%,

x cups - 75%.

Hence,

Now add 4 cups of water, the amount of punch is 20+4=24 cups, the amount of juice is 15 cups and the amount of water is 4+(20-15)=4+5=9 cups.

Thus,

24 cups - 100%,

15 cups - y%

and

i think the answer is a.( -3, -1 )