Question

When Jason left his house this morning, his cell phone was 30% charged and it then started to lose 3% charge for each hour thereafter. Write an equation for B,B, in terms of t,t, representing the charge remaining in Jason's battery, as a percentage, tt hours after Jason left his house.

Answer 1

Answer:  0.9 or 9/10.

Step-by-step explanation:

30 percent (%) of 3 is what number?

Let's call our missing number x.

Expressing this in terms of an equation, we get: 30% * 3 = x

Since a percentage is just the percent number divided by 100, we have:

x  =   30 * 3

  100

x  =  90

  100

Since our fraction is not reduced, we need to calculate a greatest common factor

From that lesson, we have a GCF of 10

Dividing numerator and denominator by our 10, we get 9/10

x = 0.9 or 9/10

Now we know that 30 percent (%) of 3 is 0.9 or 9/10.