The answer is B
Hopefully this helps
Answer:
just multiply all the numbers
Step-by-step explanation:
Answer:
(a) Increased by 100%
(b) Increased by 50%
(c) Decreased by 33.33%
(d) Decreased by 50%
(e) Increased by 200%
(f) Decreased by 66.67%
Step-by-step explanation:
In this question, we can use the following <em>formula</em>:
![\text{Percentage Change =} \dfrac{\text{New value - Old Value}}{\text{Old Value}} \times 100](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7BNew%20value%20-%20Old%20Value%7D%7D%7B%5Ctext%7BOld%20Value%7D%7D%20%5Ctimes%20100)
Positive value of percentage change means increase and
Negative value of percentage change means decrease.
Solution a)
Old Value = 1
New Value = 2
Increase of 100%
Solution b)
Old Value = 2
New Value = 3
![\text{Percentage Change =} \dfrac{\text{3 - 2}}{\text{2}} \times 100\\\Rightarrow 50\%](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7B3%20-%202%7D%7D%7B%5Ctext%7B2%7D%7D%20%5Ctimes%20100%5C%5C%5CRightarrow%2050%5C%25)
Increase of 50%.
Solution c)
Old Value = 3
New Value = 2
![\text{Percentage Change =} \dfrac{\text{2 - 3}}{\text{3}} \times 100\\\Rightarrow -33.33\%](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7B2%20-%203%7D%7D%7B%5Ctext%7B3%7D%7D%20%5Ctimes%20100%5C%5C%5CRightarrow%20-33.33%5C%25)
Decrease of 33.33%.
Solution d)
Old Value = 2
New Value = 1
![\text{Percentage Change =} \dfrac{\text{1 - 2}}{\text{2}} \times 100\\\Rightarrow -50\%](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7B1%20-%202%7D%7D%7B%5Ctext%7B2%7D%7D%20%5Ctimes%20100%5C%5C%5CRightarrow%20-50%5C%25)
Decrease of 50%.
Solution e)
Old Value = 1
New Value = 3
![\text{Percentage Change =} \dfrac{\text{3 - 1}}{\text{1}} \times 100\\\Rightarrow 200\%](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7B3%20-%201%7D%7D%7B%5Ctext%7B1%7D%7D%20%5Ctimes%20100%5C%5C%5CRightarrow%20200%5C%25)
Increase of 200%.
Solution f)
Old Value = 3
New Value = 1
![\text{Percentage Change =} \dfrac{\text{1 - 3}}{\text{3}} \times 100\\\Rightarrow -66.67\%](https://tex.z-dn.net/?f=%5Ctext%7BPercentage%20Change%20%3D%7D%20%5Cdfrac%7B%5Ctext%7B1%20-%203%7D%7D%7B%5Ctext%7B3%7D%7D%20%5Ctimes%20100%5C%5C%5CRightarrow%20-66.67%5C%25)
Decrease of 66.67%.
So, the answer is:
(a) Increased by 100%
(b) Increased by 50%
(c) Decreased by 33.33%
(d) Decreased by 50%
(e) Increased by 200%
(f) Decreased by 66.67%
20%, there are 100 people so you base each person as a percentage.