-90.08% is the change from 514 to 51
Calculation steps:
[( 51 - 514 ) ÷ 514] x 100 = -90.08%
Formula
Percentage change = [(51 - 514) / 514] x 100
Subtract the new number by the original number
51 - 514 = -463
-463 ÷ 514 = -0.9007782101167315
-0.9007782101167315 x 100 = -90.08%