-40.3% is the change from 536 to 320
Calculation steps:
[( 320 - 536 ) ÷ 536] x 100 = -40.3%
Formula
Percentage change = [(320 - 536) / 536] x 100
Subtract the new number by the original number
320 - 536 = -216
-216 ÷ 536 = -0.40298507462686567
-0.40298507462686567 x 100 = -40.3%