Maybe:
Cos90=0
I’m not sure of the question here
10% of 120 = 12
12 x 7 = 84
70% = 84
120 x 70 = 8400
8400 / 100 = 84
It’s either showing you that both sides of the equation equal to the same thing or that you can find 70% of 120 by using the steps on the right
For x y chart 19.36.2.27.13
26% = 26%/100%
26/100, 13/50
answer is 13/50