SOLUTION: How do you figure out a Pre-Algebra Percent/Pie Chart? It's like this: Cats: 25% Dogs: 45% Snakes: 15% Turtles:5% Lizards: 15% How many animals are in the pet store if there

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: How do you figure out a Pre-Algebra Percent/Pie Chart? It's like this: Cats: 25% Dogs: 45% Snakes: 15% Turtles:5% Lizards: 15% How many animals are in the pet store if there       Log On


   

Question 399363: How do you figure out a Pre-Algebra Percent/Pie Chart? It's like this:
Cats: 25%
Dogs: 45%
Snakes: 15%
Turtles:5%
Lizards: 15%
How many animals are in the pet store if there are 30 snakes?
Found 2 solutions by Fombitz, josmiceli:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
If 30 is 15% then X is 100%.
Set up a proportion.
30%2F15=X%2F100
X=200

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
A complete circle, or "pie" has 360 degrees. What you need to
do is convert percentages into degrees. For instance, 50% converts
to %2850%2F100%29%2A360+=+180 degrees
Now I'll convert the given percentages given to degrees:
--------------------
a+=+%2825%2F100%29%2A360 (90 degrees)
b+=+%2845%2F100%29%2A360 (162 degrees)
c+=+%2815%2F100%29%2A360 (54 degrees)
d+=+%285%2F100%29%2A360 (18 degrees)
e+=+%2815%2F100%29%2A360 (54 degrees)
------------------------------
The problem is that 25+%2B+45+%2B+15+%2B+5+%2B+15+=+105 %
That's 5% too much
The degrees add up to: 90+%2B+162+%2B+54+%2B+18+%2B+54+=+378 degrees
That's 18 degrees too much, which agrees with
%285%2F100%29%2A360+=+18degrees
You may have copied the problem wrong.