-10.53% is the change from 57 to 51
Calculation steps:
[( 51 - 57 ) ÷ 57] x 100 = -10.53%
Formula
Percentage change = [(51 - 57) / 57] x 100
Subtract the new number by the original number
51 - 57 = -6
-6 ÷ 57 = -0.10526315789473684
-0.10526315789473684 x 100 = -10.53%