Answer:4
Step-by-step explanation:
Ex (increase, such as taxes or price hike):
I want to increase $5 by 20%.
That means I would have to find the product of $5 and 120%.
$5*1.20=6
If you increase $5 by 20%, you will get $6.
Ex (decrease, such as a discount or a special deal):
I want to decrease $5 by 20%.
That means I would have to find the product of $5 and 80%.
$5*.80=4
If you decrease $5 by 20%, you will get 4.
Answer:

Step-by-step explanation:








No, he got an 80% on the test. 24 divided by 30=0.80
Answer:
Simple interest only pays interest on the original amount. So, if you want your amount to grow by 50% over 4 years, you will need it to grow by 1/4 of that each year. Just divide 50% by 4 to get 12.5%.
Step-by-step explanation: