Andalusia has been promoting the importance of health maintenance. From January 1,1991 to January 1,1993, the number of people enrolled in health maintenance organizations increased by 15 percent. The enrollment on January 1,1993 was 45 million. How many million people(to the nearest million) was enrolled in health maintenance organizations on January 1,1991?

• let there are 'x' population at jan1,1991
  15% of x = 15/100*(x)
  (x)+[15/100*(x)]=45 /* as there is 15% increase from 1991 to 1993*/
  x=39.13
• 12 years agoHelpfull: Yes(20) No(0)
• Approx 39.13million in January 1,1991.
  
  15% of 39.13million = 39.13*15/100 = 5.8695million
  
  So, 39.13million+5.8695million = 44.9995million(Around 45million) in January 1,1991
• 12 years agoHelpfull: Yes(6) No(7)
• consider jan 1, 1991 as A with X million..
  
  consider jan 1, 1993 as B with 45 million..
  
  increase is % is 15 i.e 45/x * 100 = 115%
  
  x = 45/115 * 100 = 900/23 = 39.13
  
  
  
• 12 years agoHelpfull: Yes(6) No(1)
• here we are asked to population in 1991 which is 2 year ago of 1993,
  so population in 1991= 45/(1+15/100)^2
  =45*20*20/(23*23)
  =18000/529
  = 34.029
• 12 years agoHelpfull: Yes(4) No(8)
• First of all we'll 15% of 45 million. Which would be equal to 6.75million.so in january 1,1991 the toat registration would be-45-6.75=38.25
• 9 years agoHelpfull: Yes(1) No(0)