-58.2% is the change from 122 to 51
Calculation steps:
[( 51 - 122 ) ÷ 122] x 100 = -58.2%
Formula
Percentage change = [(51 - 122) / 122] x 100
Subtract the new number by the original number
51 - 122 = -71
-71 ÷ 122 = -0.5819672131147541
-0.5819672131147541 x 100 = -58.2%