If 45 is 120% of a number, what is 80% of the same number?

Let x represent the unknown number.

45 = (120/100)* x

x = (45)(100/120) = (225/6)

To get 80% of x, multiply:
(80/100)(225/6) = 30

45 ÷ 120%
= 45 ÷ 120/100
= 45 x 100/120
= 45 x 5/6
= 225/6
= 37.5

37.5 x 80%
= 37.5 x 80/100
= 37.5 x 4/5
= 150/5
= 30

PROPORTIONS:
x/100 = 45/120

x= (100 times 45)/120

x= 37.5 is the number

Now once again

37.5/100= y/80

y=( 37.5 times 80 )/100 = 30 is the answer

ANSWER

Assume that 120 percent of X is 45
This means (120)(X) / 100 = 45
X = (100)(45) / 120
X = 37.5
120 percent of 37.5 is 45

We want 80 % of 37.5
=37.5 (80/100)
= 37.5 (0.8) = 30

idk

120%<--------------->45
80%<------------->(80/120) x 45

2/3 x 45

2 x 15

30

80% of number= 80/120*45=30