Posted by intooder@yahoo.com (192.112.251.48) on October 10, 2003 at 17:49:42:
In Reply to: Percentage of a Variable posted by on September 30, 2003 at 14:54:16:
I think your approach and your equation are correct. All you have to do is solve for X. From your equation:
X - 0.22*X = 199.68
X*(1 - 0.22) = 199.68
X*0.78 = 199.68
X = 199.68/0.78
X = 256.00
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So she can purchase $256.00 worth of groceries for the $198.68 that she has. Hope this helped.