What was the percent increase in the population in S.America from 1900 to 2000?
1900 = 38,000,000
1950 = 111,000,000
2000 = 515,000,000
Can someone please help guide me?? I am not great at percentages.. would I add the three and then divide by 3?
Math - Ms. Sue, Friday, August 28, 2009 at 4:25pm
According to your problem, you don't need to do anything with the numbers for 1950.
515,000,000 - 38,000,000 = 477,000,000
38,000,000 / 477,000,000 = ?
Multiply your answer by 100 (or move the decimal point two places to the right) to find the percent increase.
Math - Anonymous, Friday, August 28, 2009 at 4:28pm
Thank you Ms. Sue
the answer I got from your help was: 85%
Math - MathMate, Friday, August 28, 2009 at 4:57pm
85% does not look right.
Percentage increases are calculated as
(new value-old value) / old value.
If the population of Tokyo went from 10.18 millions to 12.79 millions in 2007, the percentage increase would be:
As suggested by Ms Sue, do not take into account of the 1950 numbers.
So percentage increase is from 38 millions in 1900 to 515 millions in 2000, or
You can check the data provided at the following link:
Math - Anonymous, Friday, August 28, 2009 at 5:02pm
hmmm confused now
Math - Ms. Sue, Friday, August 28, 2009 at 5:09pm
I'm sorry, but I misstated the division problem.
As MathMate pointed out, it should be:
477,000,000 / 38,000,000 = 12.55 = 1255%