-57.77% is the change from 817 to 345
Calculation steps:
[( 345 - 817 ) ÷ 817] x 100 = -57.77%
Formula
Percentage change = [(345 - 817) / 817] x 100
Subtract the new number by the original number
345 - 817 = -472
-472 ÷ 817 = -0.5777233782129743
-0.5777233782129743 x 100 = -57.77%