-51.36% is the change from 516 to 251
Calculation steps:
[( 251 - 516 ) ÷ 516] x 100 = -51.36%
Formula
Percentage change = [(251 - 516) / 516] x 100
Subtract the new number by the original number
251 - 516 = -265
-265 ÷ 516 = -0.5135658914728682
-0.5135658914728682 x 100 = -51.36%