-56.41% is the change from 117 to 51
Calculation steps:
[( 51 - 117 ) ÷ 117] x 100 = -56.41%
Formula
Percentage change = [(51 - 117) / 117] x 100
Subtract the new number by the original number
51 - 117 = -66
-66 ÷ 117 = -0.5641025641025641
-0.5641025641025641 x 100 = -56.41%