-18.15% is the change from 661 to 541
Calculation steps:
[( 541 - 661 ) ÷ 661] x 100 = -18.15%
Formula
Percentage change = [(541 - 661) / 661] x 100
Subtract the new number by the original number
541 - 661 = -120
-120 ÷ 661 = -0.1815431164901664
-0.1815431164901664 x 100 = -18.15%