-90.29% is the change from 340 to 33
Calculation steps:
[( 33 - 340 ) ÷ 340] x 100 = -90.29%
Formula
Percentage change = [(33 - 340) / 340] x 100
Subtract the new number by the original number
33 - 340 = -307
-307 ÷ 340 = -0.9029411764705882
-0.9029411764705882 x 100 = -90.29%