I start of with £500, now to take away 18% would be £410.
Now ignore the £500 pound, you know nothing about that, how would i get back to the £500 by just knowing the £410 and 18%.
2006-07-10 07:07:14 · 7 answers · asked by ! 2 in Education & Reference ➔ Other - Education
multiply 500 by .82 to get to 410 then you would do the inverse or divide 410 by .82 to get to 500
2006-07-10 07:11:33 · answer #1 · answered by Joker 7 · 0⤊ 0⤋
This is an algebra problem. You know that you took 18% away from something to get 410, so you can write the following
x - .18*x = 410
(1-.18)*x = 410
.82 *x = 410
You solve for x and get
x = 410 / .82 = 500
Tada!
2006-07-10 14:13:18 · answer #2 · answered by coreyhaines 1 · 0⤊ 0⤋
£410 + 18% of £410
2006-07-10 14:11:06 · answer #3 · answered by coldplayer 2 · 0⤊ 0⤋
Divide 410 by 0.82 (100% - the 18% you know) and you get the 500
2006-07-10 14:11:55 · answer #4 · answered by Bassin' 4 a Livin' 1 · 0⤊ 0⤋
You have to look at it like this. 100% is what you wish to determine subtract 18% and you come up with 82%.
410 is 82% of an amount. how to get that amount is trial and error.
if you were to start with 550 for instance 82% of 550 is 451 so we know 550 is to high. If you were to try 82% of 475 you would get 389.5 and you just narrow it down till you get the winning combination!
2006-07-10 14:16:15 · answer #5 · answered by jagerbombmeister 3 · 0⤊ 0⤋
500-500*.18 = 410
So,
500*(1-.18) = 410
So
410 / (1-.18) = 500
2006-07-10 14:14:03 · answer #6 · answered by 1,1,2,3,3,4, 5,5,6,6,6, 8,8,8,10 6 · 0⤊ 0⤋
1-0.18 = 0.82
410 / 0.82 = 500
2006-07-10 14:12:12 · answer #7 · answered by El Guapo 3 · 0⤊ 0⤋