-85.43% is the change from 350 to 51
Calculation steps:
[( 51 - 350 ) ÷ 350] x 100 = -85.43%
Formula
Percentage change = [(51 - 350) / 350] x 100
Subtract the new number by the original number
51 - 350 = -299
-299 ÷ 350 = -0.8542857142857143
-0.8542857142857143 x 100 = -85.43%