The price of a jacket is 52 dollars after a 30% increase.
What was the original price of the jacket?
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The price of a jacket is 52 dollars after a 30% increase.
What was the original price of the jacket?
To solve this problem, we'll follow these steps:
Step 1: Identify the given information and convert the percentage to a decimal.
Step 2: Apply the appropriate formula to represent the relationship between the original price and the increased price.
Step 3: Solve for the original price.
Now, let's work through each step:
Step 1: We are given a final price of .
Step 2: The formula for the new price is given by:
This can be rearranged to:
Thus, .
Step 3: Substitute the given new price into the equation:
Divide both sides by 1.30 to solve for the Original Price:
Therefore, the original price of the jacket was \40 \).
$40
Calculate 30 over 100 as a percentage:
Because the 30% increase was calculated from the original price, not the final price! When you subtract 30% from 40 is 52 is $15.60.
The growth factor represents the total amount after the increase. It's 1 (the original) + 0.30 (the increase). So 1.30 means the new price is 130% of the original price.
Always convert the percentage to decimal and add 1. For example:
For decreases, subtract the percentage from 1. A 20% decrease means the growth factor is . The method stays the same: divide the final price by the growth factor.
Yes! Use estimation. 40 × 1 = 40 × 0.3 = 40 + 52 ✓
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