You have a bowl with 200 fish in it. of these fish 99% are not guppies. how many fish should you remove so that 2% of what remains are guppies

Find how many are not guppies now

99% of 200 are not guppies

100-99=1

1% of 200 is guppies

2 are guppies

now

2=2% of all

2=0.02 of all

divide both sides by 0.02

100=all

you need to have 100 left

you need to remove

200-?=100

-?=-100

?=100

you need to remove 100 non-guppy fish so that 2% of what remains is guppies