-16.8% is the change from 607 to 505
Calculation steps:
[( 505 - 607 ) ÷ 607] x 100 = -16.8%
Formula
Percentage change = [(505 - 607) / 607] x 100
Subtract the new number by the original number
505 - 607 = -102
-102 ÷ 607 = -0.16803953871499178
-0.16803953871499178 x 100 = -16.8%