-97.7% is the change from 522 to 12
Calculation steps:
[( 12 - 522 ) ÷ 522] x 100 = -97.7%
Formula
Percentage change = [(12 - 522) / 522] x 100
Subtract the new number by the original number
12 - 522 = -510
-510 ÷ 522 = -0.9770114942528736
-0.9770114942528736 x 100 = -97.7%