-43.35% is the change from 902 to 511
Calculation steps:
[( 511 - 902 ) ÷ 902] x 100 = -43.35%
Formula
Percentage change = [(511 - 902) / 902] x 100
Subtract the new number by the original number
511 - 902 = -391
-391 ÷ 902 = -0.4334811529933481
-0.4334811529933481 x 100 = -43.35%