-59.76% is the change from 850 to 342
Calculation steps:
[( 342 - 850 ) ÷ 850] x 100 = -59.76%
Formula
Percentage change = [(342 - 850) / 850] x 100
Subtract the new number by the original number
342 - 850 = -508
-508 ÷ 850 = -0.5976470588235294
-0.5976470588235294 x 100 = -59.76%