-39.92% is the change from 516 to 310
Calculation steps:
[( 310 - 516 ) ÷ 516] x 100 = -39.92%
Formula
Percentage change = [(310 - 516) / 516] x 100
Subtract the new number by the original number
310 - 516 = -206
-206 ÷ 516 = -0.3992248062015504
-0.3992248062015504 x 100 = -39.92%