-40.12% is the change from 516 to 309
Calculation steps:
[( 309 - 516 ) ÷ 516] x 100 = -40.12%
Formula
Percentage change = [(309 - 516) / 516] x 100
Subtract the new number by the original number
309 - 516 = -207
-207 ÷ 516 = -0.4011627906976744
-0.4011627906976744 x 100 = -40.12%