Find the percent of increase or decrease.
The price of a radio changes from $40.00 to $44.00.
A. 10% decrease
B. 10% increase
C. 36.4% decrease
D. 40% increase
To find the percent of increase or decrease, we can use the formula:
Percent change = (New value - Old value) / Old value * 100
Given that the old price of the radio is $40.00 and the new price is $44.00, we can substitute these values into the formula:
Percent change = (44 - 40) / 40 * 100
Simplifying this equation:
Percent change = 4 / 40 * 100
Percent change = 0.1 * 100
Percent change = 10
Therefore, the correct answer is B. 10% increase.
To find the percent of increase or decrease, we can use the following formula:
Percent change = ((new value - old value) / old value) * 100
In this case, the old value (initial price) is $40.00 and the new value (final price) is $44.00. Let's calculate the percent change:
Percent change = (($44.00 - $40.00) / $40.00) * 100
Percent change = ($4.00 / $40.00) * 100
Percent change = 0.1 * 100
Percent change = 10
Therefore, the percent change is 10%, which means the price of the radio increased by 10%. The correct answer is option B. 10% increase.