-52.51% is the change from 817 to 388
Calculation steps:
[( 388 - 817 ) ÷ 817] x 100 = -52.51%
Formula
Percentage change = [(388 - 817) / 817] x 100
Subtract the new number by the original number
388 - 817 = -429
-429 ÷ 817 = -0.5250917992656059
-0.5250917992656059 x 100 = -52.51%