-53.21% is the change from 109 to 51
Calculation steps:
[( 51 - 109 ) ÷ 109] x 100 = -53.21%
Formula
Percentage change = [(51 - 109) / 109] x 100
Subtract the new number by the original number
51 - 109 = -58
-58 ÷ 109 = -0.5321100917431193
-0.5321100917431193 x 100 = -53.21%