Question

Joanne bought 50 goldfish, 60% of them were female. When some female goldfish died,

the percentage of the female goldfish decreased by 30%?
a) How many male goldfish were there?

b) How many female goldfish died?

Answer 1

To solve this problem, first calculate the number of female and male goldfish. Then, find the number of female goldfish that died. There are 29 male goldfish. 9 female goldfish died.

Step-by-step explanation:

To solve this problem, we need to follow the given information step by step.

a) The problem states that 60% of the goldfish are female.

So, out of 50 goldfish, 0.6 * 50 = 30 goldfish are female.

Since the percentage of female goldfish decreased by 30%, we can multiply 30 by 0.7 to find the number of female goldfish remaining. 30 x 0.7 = 21.

To find the number of male goldfish, we subtract the number of females from the total number of goldfish. 50 - 21 = 29.

Therefore, there are 29 male goldfish.

b) To find the number of female goldfish that died, we subtract the remaining female goldfish from the initial number of female goldfish. 30 - 21 = 9.

Therefore, 9 female goldfish died.

Answer 2

a) 20 male fish

b) 9 female fish died

Step-by-step explanation:

total 50 gold fish that means 100%

so 1% means 0.5

then 60% means 0.5 x 60 = 30 female fish

after 30% female fish died from the 60% it becomes

`30*(30)/(100) = 9`

so it becomes 9 female fish now

a) ealier we had 30 female fish then the male fish are 20
b) ealier we had 30 female fish and from that 9 died