-71.73% is the change from 902 to 255
Calculation steps:
[( 255 - 902 ) ÷ 902] x 100 = -71.73%
Formula
Percentage change = [(255 - 902) / 902] x 100
Subtract the new number by the original number
255 - 902 = -647
-647 ÷ 902 = -0.7172949002217295
-0.7172949002217295 x 100 = -71.73%