Working Out A Percentage Increase

[bednobs]

something initially cost 115. The price increased to 144.
How to work out the % increase, and the answer please

[Prudie]

Original 115
It's increased by 29 (144-115)
express 29 as a %age of 115
29/144 x 100 = a tiny bit over 20% increase (20.139 to 3 dec places)

[Fitzer]

Subtract 115 from 144, divide answer by 115 and then multiply by 100. You tell us what you make it and we’ll respond :-)

[Togo]

The Increase divided by the original price X 100.

29 divided by 100 = 0.2521739130434783 X 100 = 25.21739130434783

[Prudie]

sorry typed the wrong thing in, should be
29/115 X 100 which works out as a bit over 25% increase

[New Judge]

OK up to line 3, Prudie.

But I think you mean 29/115 x 100, which equals 25.217%

[Prudie]

Yes very irritating when I know exactly what I'm doing but don't check what I'm typing into a calculator :-(

[gingejbee]

^NJ..must read and type faster.

[ToraToraTora]

the easy way is to divide 144 by 115
114/115=1.25217 then drop the 1 and move the dp 2 places to the right giving 25.217.

[ToraToraTora]

prudie would have been right if she'd divided the 29 by 115
29/115=0.25217 = 25.217%

[ToraToraTora]

The interesting thing is though that if you now reduce 144 by 25.217% you don't get back to 115!

[roadman]

If you can find one percent of something then you can take on anything but i dont know how to find one percent but i think here it is 1.44 do you divide it by 100 or something cant remember

[ToraToraTora]

N/100 = 1% of N. But this is working out a percentage increase.

[DTCwordfan]

Jeez - your 'tricity or wine bill??

[New Judge]

//The interesting thing is though that if you now reduce 144 by 25.217% you don't get back to 115!//

Well you wouldn’t, would you? Just using VAT calculations as an example (because the numbers are easier), if something is priced at £100 plus VAT, the £100 is increased by 20% to make £120. If you reduce £120 by 20% you get £96. The £120 is in fact 120% (six fifths) of the base price. To get back to the base price (five fifths) you must reduce it by one of the six fifths (16.67%).

[ToraToraTora]

I know that judge but the world is getting ever more full of innumerate people. It was a TIC observation.

[New Judge]

Fair enough! I know what you mean, Tora. It infuriates me when I hear people say "I'm useless with numbers" (or similar). Hopefully we've helped some of them tonight! :-)

[Atheist]

Going back to bednobs post; I doubt if anyone here has come anywhere near helping her (apart from simply telling her the answer). You're all know-it-alls and none of you knows how to teach.
No communication skills.

[Prudie]

Well I know how to teach and think my first simple explanation shows so. It was just really remiss of me to type the wrong numbers last line.
If bednobs had asked for a lesson in percentages there are plenty on here capable of providing that, some would have produced a near essay length answer.

[bobbinwales]

Atheists post would be more hekpful if it included at lest an attempt to help the OP

[THECORBYLOON]

With N being the new amount and O being the old amount, on your calculator, type in,

(N-O)÷O% and press "="

In your example,

(144−115)÷115% = 25.2%