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Explanation:
he stated with $400.
2/5 of that is spent on a vacuum cleaner :
400 × 2/5 = 800/5 = $160
after that he had
400 - 160 = $240
he spent 1/4 of that remainder on a fan :
240 × 1/4 = 240/4 = $60
so, he had
400 - 160 - 60 = $180
left
Answer:
he had $180 left