1.Between 1950 and 2004, the world population increased exponentially from 2.5 billion to 6.4 billion, what is the percent change?
2.Calculate the percent decrease if there are 620 incoming freshmen and 500 graduated seniors?
percent change: (amount change/initial value ) x 100
I keep on getting 156% and 24% is it right?
1) correct
2) no. the initial value is 620
So it is 156% increase and 19.4% decrease?
I agree with 156%.
Try # 2 again.
The amount of the change was 120. The initial value was 620.
So #2 is 19.4% decrease?
Yes -- it was a 19.4% decrease.
To find the percent change, you can use the formula:
Percent change = (Amount change / Initial value) x 100
1. To calculate the percent change in the world population between 1950 and 2004, we need to find the amount change and the initial value.
Amount change = 6.4 billion - 2.5 billion = 3.9 billion
Initial value = 2.5 billion
Now, substitute these values into the formula:
Percent change = (3.9 billion / 2.5 billion) x 100
Simplifying the fraction:
Percent change = 1.56 x 100
The percent change is 156%.
Therefore, your answer of 156% is correct.
2. To find the percent decrease in the number of students, we need to find the amount change and the initial value.
Amount change = Incoming freshmen - Graduated seniors
= 620 - 500
= 120
Initial value = Incoming freshmen = 620
Now, substitute these values into the formula:
Percent change = (120 / 620) x 100
Simplifying the fraction:
Percent change = 0.1935 x 100
The percent change is approximately 19.35%.
Therefore, your second answer of 19.35% is correct.