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Sure I used to know how to do this!
I have a number, and I know this number is 70% of a higher number, but I don't know the higher number. How do I work out what the higher number was?
e.g. if my number is 70, then the higher number would be 100. Any ideas on how to work this out?
Hmmm.. just been fiddling about on a calculator.
x = the number you know
x * (((100 - x) / x) + 1)
seems to do it. I think.
I think it should be
x / 70 * 100
ha ha - or not
So, taking your example of 70,
70/.7 = x
100 = x
The trick I learned was to form a question.
"70 is 70% of what number?"
The "is" refers to an "="
The "of" refers to multiplication.
The "what" is an unknown variable.
That is the only way I remember after all these years!
"70% of 100 is what?"
.7 X 100 = n
Okay, its a dumb trick, but it works for me.
That was a reply to my thread by the way, not yours!
Thanks all! Was working late last night and my brain isn't functioning quite as it should be.
Just write the equation as you think through it...
What Number (N) when multiplied by 70% equals 70?
N x 0.7 = 70
N = 70/0.7
N = 100
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