You know what? You can type that into Google. Just type "20 percent of 450" into the search bar and the first response in the pop up is the answer.

2 x 45= 90 450 - 90= 360

450 X .20 = 90. 450 - 90 = 360.

20% of 450 is 90.

So, that'd be 360 with the 90 subtracted.

450 - (20% of 450)

80% x 450

360

360