-71.35% is the change from 349 to 100
Calculation steps:
[( 100 - 349 ) ÷ 349] x 100 = -71.35%
Formula
Percentage change = [(100 - 349) / 349] x 100
Subtract the new number by the original number
100 - 349 = -249
-249 ÷ 349 = -0.7134670487106017
-0.7134670487106017 x 100 = -71.35%