Notebooks cost a $1.20 each this week and they will be on sale for $0.80 what percentage is the sale

We can use algebra.

So, what rate time 1.20 = .80

Let x = the rate (in a decimal form)

1.20x = .80

x = .6666666666

Now, we need to multiply by 100 to get a percentage.

66.66 The price is 66% of the regular price.

They marked it off

33.33%

The answer to you question is 2/3 or 67%

20

step-by-step explanation:

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°