-57.56% is the change from 813 to 345
Calculation steps:
[( 345 - 813 ) ÷ 813] x 100 = -57.56%
Formula
Percentage change = [(345 - 813) / 813] x 100
Subtract the new number by the original number
345 - 813 = -468
-468 ÷ 813 = -0.5756457564575646
-0.5756457564575646 x 100 = -57.56%