-64.83% is the change from 145 to 51
Calculation steps:
[( 51 - 145 ) ÷ 145] x 100 = -64.83%
Formula
Percentage change = [(51 - 145) / 145] x 100
Subtract the new number by the original number
51 - 145 = -94
-94 ÷ 145 = -0.6482758620689655
-0.6482758620689655 x 100 = -64.83%