-70.75% is the change from 817 to 239
Calculation steps:
[( 239 - 817 ) ÷ 817] x 100 = -70.75%
Formula
Percentage change = [(239 - 817) / 817] x 100
Subtract the new number by the original number
239 - 817 = -578
-578 ÷ 817 = -0.7074663402692778
-0.7074663402692778 x 100 = -70.75%