Dylan has 765 cards in his baseball card collection. He sells 153 of the cards. What is the percent of decrease in the number of cards in the collection?
Joshua/Jesse/Abraham -- we showed you how to do two of this type of problem. Now it's your turn.
How do you think you should solve it? What is your answer?
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Using proportions and subtracting 765 and 153 you get 612 and divide that by 153 and get 4 and multiply it by 100
612/765 = 0.8 = 80%
100 - 80 = 20% decrease
To find the percent of decrease in the number of cards in Dylan's collection, you can use the following formula:
Percent Decrease = (Decrease in Quantity / Initial Quantity) * 100
Let's calculate the decrease in quantity first.
Decrease in Quantity = Initial Quantity - Final Quantity
Given that Dylan has 765 cards in his collection and sells 153 of them, we can calculate the final quantity:
Final Quantity = Initial Quantity - Quantity Sold
Final Quantity = 765 - 153
Final Quantity = 612
Now we can calculate the decrease in quantity:
Decrease in Quantity = 765 - 612
Decrease in Quantity = 153
Now let's calculate the percent of decrease:
Percent Decrease = (153 / 765) * 100
Percent Decrease = 0.2 * 100
Percent Decrease = 20
Therefore, the percent of decrease in the number of cards in Dylan's collection is 20%.