SOLUTION: If sales are £12500 and they were up 23.6% on last year how do I work out what sales were last year?

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Question 888670: If sales are £12500 and they were up 23.6% on last year how do I work out what sales were last year?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let X be the sales from last year.
X%281%2B23.6%2F100%29=12500
X%281.236%29=12500
X=12500%2F1.236