-70.85% is the change from 343 to 100
Calculation steps:
[( 100 - 343 ) ÷ 343] x 100 = -70.85%
Formula
Percentage change = [(100 - 343) / 343] x 100
Subtract the new number by the original number
100 - 343 = -243
-243 ÷ 343 = -0.7084548104956269
-0.7084548104956269 x 100 = -70.85%