-8.47% is the change from 661 to 605
Calculation steps:
[( 605 - 661 ) ÷ 661] x 100 = -8.47%
Formula
Percentage change = [(605 - 661) / 661] x 100
Subtract the new number by the original number
605 - 661 = -56
-56 ÷ 661 = -0.08472012102874432
-0.08472012102874432 x 100 = -8.47%