-64.71% is the change from 51 to 18
Calculation steps:
[( 18 - 51 ) ÷ 51] x 100 = -64.71%
Formula
Percentage change = [(18 - 51) / 51] x 100
Subtract the new number by the original number
18 - 51 = -33
-33 ÷ 51 = -0.6470588235294118
-0.6470588235294118 x 100 = -64.71%