-17.5% is the change from 817 to 674
Calculation steps:
[( 674 - 817 ) ÷ 817] x 100 = -17.5%
Formula
Percentage change = [(674 - 817) / 817] x 100
Subtract the new number by the original number
674 - 817 = -143
-143 ÷ 817 = -0.17503059975520197
-0.17503059975520197 x 100 = -17.5%