Question

How do you find 80% of 45

Answer 1

1. We assume, that the number 45 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 45 is 100%, so we can write it down as 45=100%.

4. We know, that x is 80% of the output value, so we can write it down as x=80%.

5. Now we have two simple equations:

1) 45=100%

2) x=80%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

45/x=100%/80%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 80% of 45

45/x=100/80

(45/x)*x=(100/80)*x       - we multiply both sides of the equation by x

45=1.25*x       - we divide both sides of the equation by (1.25) to get x

45/1.25=x

36=x

x=36

now we have:

80% of 45=36

I HOPE THIS HELPS

Answer 2

Answer:

36

Step-by-step explanation:

80 x 45 = 3600

3600/100=36