You have a number 640 which which is the result of a number reduced by 84%. What is the original number?
2007-01-16 05:37:38 · 5 answers · asked by cougaraw2 1 in Science & Mathematics ➔ Mathematics
Take the number, 640 and divide by (100-84%) = 4000.
640/.16=4000
when you are reducing something by 84%, then only 16% remains, so you cannot divide by 84%, because then your number has only been reduced 16% from the original
2007-01-16 05:42:27 · answer #1 · answered by john smith 4 · 0⤊ 0⤋
You had a number, took away 84% of it, and wound up with 640. This translates to x - 0.84x = 640. Solve for x to find the original number. You should end up with 4000. If you're looking for its inverse, just take 1/x.
0.16x = 640
(16/100)x = 640
x = (640*100)/16
x = 4000
So 1/x = 1/4000
2007-01-16 05:46:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
depends what you mean with "reduced" by a percentage 84%
this :
X84/100 = 640 ( given )
thus X = 640 * 100/84
or this
X - X84/100 = 640
thus X = 640 * 100/16
2007-01-16 08:12:01 · answer #3 · answered by gjmb1960 7 · 0⤊ 0⤋
It's 640/0.84 = 761.904761.....
2007-01-16 05:45:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
divide by 0.84 will give you back the original 100%.
Drew is right.
It should be divide by 0.16
2007-01-16 05:42:06 · answer #5 · answered by e_kueh 2 · 1⤊ 0⤋