Question 428077
let us say fishes are x
guppies =0.6x  angelfish =.4x

x-81 is now the no. of fishes

guppies =.75*.6(x=.45x
angelfish = .25x*.4=.10x

total combined =x-81
.45x+.10x=x-81
x-0.55x=81
0.45x= 81
x=222  ANS

I hope this is correct