-43.9% is the change from 902 to 506
Calculation steps:
[( 506 - 902 ) ÷ 902] x 100 = -43.9%
Formula
Percentage change = [(506 - 902) / 902] x 100
Subtract the new number by the original number
506 - 902 = -396
-396 ÷ 902 = -0.43902439024390244
-0.43902439024390244 x 100 = -43.9%