-75.94% is the change from 212 to 51
Calculation steps:
[( 51 - 212 ) ÷ 212] x 100 = -75.94%
Formula
Percentage change = [(51 - 212) / 212] x 100
Subtract the new number by the original number
51 - 212 = -161
-161 ÷ 212 = -0.7594339622641509
-0.7594339622641509 x 100 = -75.94%