SOLUTION: what is the formula to add 40% to any given amount of money, say, add 40% to $67.50. and visa versa whats the formula to subtract 40% of any given amount of money. Thank you, w

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Question 681787: what is the formula to add 40% to any given amount of money, say, add 40% to $67.50.
and visa versa
whats the formula to subtract 40% of any given amount of money.
Thank you,
wendears@yahoo.com
really!

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Take 40% of 67.50 to get 0.4*67.50 = 27

So 40% of $67.50 is $27.

Add this to the original amount ($67.50) to get

67.50 + 27 = 94.50

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Doing it in general

If you want to add 40% to any amount, call it x dollars, then

take 40% of x to get 0.4x

Then add it to the original amount x to get x + 0.4x

You can combine like terms to get 1.4x

Notice how 1.4 times 67.50 gives you the same answer as before.