-73.87% is the change from 815 to 213
Calculation steps:
[( 213 - 815 ) ÷ 815] x 100 = -73.87%
Formula
Percentage change = [(213 - 815) / 815] x 100
Subtract the new number by the original number
213 - 815 = -602
-602 ÷ 815 = -0.7386503067484662
-0.7386503067484662 x 100 = -73.87%