-78.7% is the change from 817 to 174
Calculation steps:
[( 174 - 817 ) ÷ 817] x 100 = -78.7%
Formula
Percentage change = [(174 - 817) / 817] x 100
Subtract the new number by the original number
174 - 817 = -643
-643 ÷ 817 = -0.7870257037943696
-0.7870257037943696 x 100 = -78.7%