-78.98% is the change from 609 to 128
Calculation steps:
[( 128 - 609 ) ÷ 609] x 100 = -78.98%
Formula
Percentage change = [(128 - 609) / 609] x 100
Subtract the new number by the original number
128 - 609 = -481
-481 ÷ 609 = -0.7898193760262726
-0.7898193760262726 x 100 = -78.98%