Mike is saving up to buy a house.  He puts away 10% of his $150,000 a year salary.  He needs to save up 20% of the cost of a $450,000 house for a downpayment.  How long will it take?
He saves 150,000*.1=$<<150000*.1=15000>>15,000 per year
He needs 450,000*.2=$<<450000*.2=90000>>90,000
So he needs to save for 90,000/15,000=<<90000/15000=6>>6 years
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