-74.3% is the change from 817 to 210
Calculation steps:
[( 210 - 817 ) ÷ 817] x 100 = -74.3%
Formula
Percentage change = [(210 - 817) / 817] x 100
Subtract the new number by the original number
210 - 817 = -607
-607 ÷ 817 = -0.7429620563035496
-0.7429620563035496 x 100 = -74.3%