-70.3% is the change from 431 to 128
Calculation steps:
[( 128 - 431 ) ÷ 431] x 100 = -70.3%
Formula
Percentage change = [(128 - 431) / 431] x 100
Subtract the new number by the original number
128 - 431 = -303
-303 ÷ 431 = -0.703016241299304
-0.703016241299304 x 100 = -70.3%