SOLUTION: if a is 4 % of b and b is 25% of c, what % of a is c?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: if a is 4 % of b and b is 25% of c, what % of a is c?      Log On


   

Question 267992: if a is 4 % of b and b is 25% of c, what % of a is c?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
given:
(1) a+=+.04b
(2) b+=+.25c
------------------
Solve for b in (1)
(1) b+=+a%2F.04
Substitute this result in (2)
a%2F.04+=+.25c
a+=+.04%2A.25c
a+=+.01c
a is 1% of c
The question is
What percent of a is c?
c+=+100a
c+=+%2810000%2F100%29%2Aa
c is 10,000 % of a