If Keith spent 1/5 of his money on a storybook, then he had 5/5 - 1/5 = <<5/5-1/5=4/5>>4/5 of his money left.
Let M be the amount of money Keith had.
He gave his brother $46.80, so he had 4/5M - $46.80 = 1/2M left.
Thus, 4/5M - 1/2M = $46.80.
Therefore, 4/5M - 2/5M = $46.80.
Thus, 2/5M = $46.80.
Therefore, M = $46.80 / (2/5) = $46.80 / (2/5) = $46.80 / (2/5) = $117.
Thus, Keith had $117 - $46.80 = $<<117-46.80=70.20>>70.20 left. Answer: \boxed{70.20}.
Keith spent 1 5 of his money on a story book he gave $46.80 to his brother and had 1 2 of his money left how much money did he left?
1 answer