Question
In two years, half the tiles fall off from a wall. How
many years will it be when 75% of the tiles have fallen off?Solution
ATQ, If half the tiles fall off in two years, it means the rate of tiles falling off is 25% per year (since 50% over two years). To find out how many years it will take for 75% of the tiles to fall off, we can set up a proportion: 
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