-71.35% is the change from 178 to 51
Calculation steps:
[( 51 - 178 ) ÷ 178] x 100 = -71.35%
Formula
Percentage change = [(51 - 178) / 178] x 100
Subtract the new number by the original number
51 - 178 = -127
-127 ÷ 178 = -0.7134831460674157
-0.7134831460674157 x 100 = -71.35%