-8.17% is the change from 661 to 607
Calculation steps:
[( 607 - 661 ) ÷ 661] x 100 = -8.17%
Formula
Percentage change = [(607 - 661) / 661] x 100
Subtract the new number by the original number
607 - 661 = -54
-54 ÷ 661 = -0.08169440242057488
-0.08169440242057488 x 100 = -8.17%