-79.24% is the change from 342 to 71
Calculation steps:
[( 71 - 342 ) ÷ 342] x 100 = -79.24%
Formula
Percentage change = [(71 - 342) / 342] x 100
Subtract the new number by the original number
71 - 342 = -271
-271 ÷ 342 = -0.7923976608187134
-0.7923976608187134 x 100 = -79.24%