SOLUTION: In a jar of coins in which 35% of the coins are pennies, 50% of the pennies were minted before 1975. If there are 245 pennies minted before 1975 in the jar, what is the total numbe

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Question 807964: In a jar of coins in which 35% of the coins are pennies, 50% of the pennies were minted before 1975. If there are 245 pennies minted before 1975 in the jar, what is the total number of coins in the jar?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
"If there are 245 pennies minted before 1975 in the jar,"

That is half of the 35%. I see no other formal way to handle the problem, but working with this first fact, 35% of the coins in the jar is 2%2A245=490 pennies.

Knowing that 490 is 35 percent of Quantity of Coins, this becomes a typical beginners elementary basic math question.

Q for how many coins in the jar,
%2835%2F100%29Q=490
Q=490%28100%2F35%29
Q=%287%2A7%2A2%2A5%2A100%29%2F%285%2A7%29
Q=%287%2A2%2A100%29
highlight%28Q=1400%29-------------1400 coins