mcdonalds total revenue in 2003 was $17.1 billion. this is a 28.5% increase over the 1999 revenue. what was mcdonalds revenue in 1999

Question

i just need help setting it up.

Answer 1

Let R be the revenue in 1999

 

so, revenue in  2003 is (R + .285R = 17,100,000,000)

 

1.285R = 17,100,000,000

 

R = (17,100,000,000)/1.285

 

R≈ $13,307,392,996.11