-77.18% is the change from 609 to 139
Calculation steps:
[( 139 - 609 ) ÷ 609] x 100 = -77.18%
Formula
Percentage change = [(139 - 609) / 609] x 100
Subtract the new number by the original number
139 - 609 = -470
-470 ÷ 609 = -0.7717569786535303
-0.7717569786535303 x 100 = -77.18%