-78.34% is the change from 817 to 177
Calculation steps:
[( 177 - 817 ) ÷ 817] x 100 = -78.34%
Formula
Percentage change = [(177 - 817) / 817] x 100
Subtract the new number by the original number
177 - 817 = -640
-640 ÷ 817 = -0.7833537331701347
-0.7833537331701347 x 100 = -78.34%