I know the answer is £180 but how do you calculate this for any
any ammount & any percentage
2006-06-29 00:11:18 · 19 answers · asked by ahbooser 2 in Science & Mathematics ➔ Mathematics
this is how i would do it.
"it's price has been increased by 10%, so if we say that £198 is 110% now, we want to find out what is 100%...ok, so divide 198 by 110 & then multiply it by 100 &.....
hope this helps
2006-06-29 10:21:29 · answer #1 · answered by stinkycatwoman 1 · 7⤊ 2⤋
£198/110*100 = £180
2006-06-29 07:14:39 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Let
x = the initial price
y = the percent that the initial price has been increased by
z = the resulting price after the increasing
So the formula for any ammount and any percentage is:
x + x * y = z
That means that for your example we should have:
x + x * 10% = 198
x + x * 1/10 = 198
10 * x + x = 1980
11 * x = 1980
x = 180 - the initial price
2006-06-29 07:52:53 · answer #3 · answered by Stinga D 2 · 0⤊ 0⤋
You start with the price (or amount) something is now, in this case £198. Divide it by 100% plus the percentage it has been increased by, in this case 10.
£198/110% = 1.8
Multiply your answer by 100 and thats the answer, hope it helps! x
2006-06-29 07:30:46 · answer #4 · answered by lindsay 4 · 0⤊ 0⤋
100% ÷ 110% = 0.9090909
0.909 x £198.00 = £179.9999999 > £180.00
alternatively
110% ÷ 100% = 1.1
£198 ÷ 1.1 = £180
then checking back through
(10%÷100%) = 0.1
0.1 x £180 = £18
£180 + £18 = £198
2006-06-29 07:28:22 · answer #5 · answered by Anonymous · 0⤊ 0⤋
£198 divide 110 x100 = £180
2006-06-29 07:18:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Divide 198 by 1.1 which gives you 180
For other percentages for example 12% just divide by 1. (then the percentage)in this case 12% so it will be number divided by 1.12 or for 22% it will be number divided by 1.22.....
2006-06-29 11:50:52 · answer #7 · answered by eyelinergirl 1 · 0⤊ 0⤋
Let x the the cost at which it was sold. Let y be the original price. And let z be the percentage by which the price was increased. Then the formula would be:
y=(x*100)/(z+100)
This will be the general formula!
2006-06-29 07:18:51 · answer #8 · answered by Taimoor 4 · 0⤊ 0⤋
Yes, its £180.00.
Divide 198 by 1.10. Not quite sure why, but the .10 is the 10%.
For example if you have the gross amount of a product and yu wanted to know the amount before VAT, then you would divide it by 1.175.
If that makes sense!
2006-06-29 07:28:51 · answer #9 · answered by Sue 1 · 0⤊ 0⤋
198/110*100
2006-06-29 07:15:15 · answer #10 · answered by Toy 2 · 0⤊ 0⤋