Due to inflation there were two demnd increases. After the secound, the price of a certin item becam 6 times the original. What percent increase of the secound if the first was 50%?
Let x be the original cost of the item and y be the second percent increase of its cost.
In the first percent increase, the price of the item becomes 1.5x. Then in the second 1.5x * y=6x. y must be equal to 4.5x, which means it is 300%.