SOLUTION: Jeremy invested some money in a company's stock. Luckily for Jeremy, the company became very popular and the value of Jeremy's investment this morning is 7 times as large as the va

Question 1123918: Jeremy invested some money in a company's stock. Luckily for Jeremy, the company became very popular and the value of Jeremy's investment this morning is 7 times as large as the value of his investment yesterday morning.
a. The value of Jeremy's investment this morning is what percent of the value of his investment yesterday morning?
b. By what percent did the value of Jeremy's investment change by from yesterday morning to this morning?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
general rules:

percent of new value to old value is equal to new value / old value * 100.

in your problem, the new value is 7 and the old value is 1, therefore the percent of new value to old value is 7 / 1 * 100 = 700%.

percent of new value increase to old value is equal to (new value - old value) / old value.

in your problem, the new value is 7 and the old value is 1.
that's an increase of 6.
the percent increase is 6/1 * 100 = 600%.

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