-91.65% is the change from 611 to 51
Calculation steps:
[( 51 - 611 ) ÷ 611] x 100 = -91.65%
Formula
Percentage change = [(51 - 611) / 611] x 100
Subtract the new number by the original number
51 - 611 = -560
-560 ÷ 611 = -0.9165302782324058
-0.9165302782324058 x 100 = -91.65%