An animal shelter houses only cats and dogs, and there are 25% more cats than dogs. if there are 40 cats, how many dogs are there, and how many animals are there total?

X is  the number of dog
y is the number of cats , y=40
25% of x is  25*x /100=25x/100=x/4
and there are 25% more cats than dogs means y+ x/4=x implies 40=(3/4)x
x=160/3=53
so the number of dogs is 53 and the number of cats is 40
the total number is 53+40=93

X - number of dogs,
100%+ 25%= 125%
x * 1.25 = 40
x = 40 : 1.25
x = 32
There are 32 dogs.
In total: 32 + 40 = 72 animals.