-75.83% is the change from 211 to 51
Calculation steps:
[( 51 - 211 ) ÷ 211] x 100 = -75.83%
Formula
Percentage change = [(51 - 211) / 211] x 100
Subtract the new number by the original number
51 - 211 = -160
-160 ÷ 211 = -0.7582938388625592
-0.7582938388625592 x 100 = -75.83%