-80% is the change from 355 to 71
Calculation steps:
[( 71 - 355 ) ÷ 355] x 100 = -80%
Formula
Percentage change = [(71 - 355) / 355] x 100
Subtract the new number by the original number
71 - 355 = -284
-284 ÷ 355 = -0.8
-0.8 x 100 = -80%
Example