-38.59% is the change from 850 to 522
Calculation steps:
[( 522 - 850 ) ÷ 850] x 100 = -38.59%
Formula
Percentage change = [(522 - 850) / 850] x 100
Subtract the new number by the original number
522 - 850 = -328
-328 ÷ 850 = -0.38588235294117645
-0.38588235294117645 x 100 = -38.59%