-83.33% is the change from 330 to 55
Calculation steps:
[( 55 - 330 ) ÷ 330] x 100 = -83.33%
Formula
Percentage change = [(55 - 330) / 330] x 100
Subtract the new number by the original number
55 - 330 = -275
-275 ÷ 330 = -0.8333333333333334
-0.8333333333333334 x 100 = -83.33%