-62.68% is the change from 343 to 128
Calculation steps:
[( 128 - 343 ) ÷ 343] x 100 = -62.68%
Formula
Percentage change = [(128 - 343) / 343] x 100
Subtract the new number by the original number
128 - 343 = -215
-215 ÷ 343 = -0.6268221574344023
-0.6268221574344023 x 100 = -62.68%