190% of what amount is $158? Round to the nearest cent
The correct answer and explanation is:
To find 190% of what amount is $158, we can set up the equation: 158=1.90×x158 = 1.90 \times x
To solve for xx, divide both sides by 1.90: x=1581.90x = \frac{158}{1.90} x=83.16x = 83.16
Answer: $83.16
Explanation (Approx. 300 Words):
This type of problem involves working with percentages and solving for an unknown original amount. The question asks: “190% of what amount equals $158?” To solve this, we need to reverse the percentage calculation process.
Percent means “per hundred,” so 190% means 190 per 100, or 1.90 in decimal form. The phrase “190% of what amount” indicates multiplication. We’re looking for the number that, when multiplied by 1.90, gives us $158.
Here’s how we solve it step by step:
- Translate the problem into a mathematical equation.
Let the unknown amount be xx. Then: 1.90×x=1581.90 \times x = 158 - Solve for xx.
To isolate xx, divide both sides of the equation by 1.90: x=1581.90x = \frac{158}{1.90} x=83.1578947368…x = 83.1578947368… - Round to the nearest cent.
Since we’re dealing with money, we round to two decimal places: x≈$83.16x \approx \text{\$}83.16
Why This Works:
In percentage problems, if you know the result and the percentage, you can find the original amount by dividing the result by the decimal form of the percentage. This is the inverse of finding a percentage of a number.
In real-life scenarios, such as determining the base price before a 190% markup or figuring out the original amount before a 190% increase, this calculation is particularly useful.
So, if 190% of a value equals $158, that original value is $83.16.