-74.14% is the change from 839 to 217
Calculation steps:
[( 217 - 839 ) ÷ 839] x 100 = -74.14%
Formula
Percentage change = [(217 - 839) / 839] x 100
Subtract the new number by the original number
217 - 839 = -622
-622 ÷ 839 = -0.7413587604290822
-0.7413587604290822 x 100 = -74.14%