-7.56% is the change from 661 to 611
Calculation steps:
[( 611 - 661 ) ÷ 661] x 100 = -7.56%
Formula
Percentage change = [(611 - 661) / 661] x 100
Subtract the new number by the original number
611 - 661 = -50
-50 ÷ 661 = -0.07564296520423601
-0.07564296520423601 x 100 = -7.56%