2007-07-01 14:12:27 · 5 answers · asked by Dylan P 2 in Science & Mathematics ➔ Mathematics
The correct answer is:
100*(20-3.5)/3.5 = 471.42875143% increase
NOT 474!
2007-07-01 14:21:35 · answer #1 · answered by jimschem 4 · 0⤊ 0⤋
When calculating percentages, the rule is to divide the change by the starting amount. In your problem, the change is 20-3.5 =16.5 million. The starting amount is 3.5, so your calculation is 16.5/3.5 = 4.71/1
Per cent comes from "per centum", meaning per hundred. Multiply 4.71/1 by 100/100 and you get
471/100, or "471 percent".
It's important to remember this rule, or else you can be led astray. For example, a raise from $1 to $2 is an increase of 100%, but a drop from $2 to $1 is a decrease of 50%!
Good luck with your work in math.
2007-07-01 14:29:41 · answer #2 · answered by Grampedo 7 · 0⤊ 0⤋
Hi,
(20 - 3.5)/3.5 = 4.714285714 = 471 3/7% increase
I hope that helps!! :-)
2007-07-01 14:19:14 · answer #3 · answered by Pi R Squared 7 · 0⤊ 0⤋
20,000,000/3,500,000 x 100 the zeros cancel out so
200/35 x100 =571.4%
so 571.4% -100% =471.4% which is the %increase
2007-07-01 14:35:53 · answer #4 · answered by Psygnosis 3 · 0⤊ 0⤋
(20m - 3.5m) / 3.5m = 4.74 = 474 % increase
2007-07-01 14:15:26 · answer #5 · answered by TychaBrahe 7 · 0⤊ 0⤋