-79.42% is the change from 345 to 71
Calculation steps:
[( 71 - 345 ) ÷ 345] x 100 = -79.42%
Formula
Percentage change = [(71 - 345) / 345] x 100
Subtract the new number by the original number
71 - 345 = -274
-274 ÷ 345 = -0.7942028985507247
-0.7942028985507247 x 100 = -79.42%