-63.69% is the change from 661 to 240
Calculation steps:
[( 240 - 661 ) ÷ 661] x 100 = -63.69%
Formula
Percentage change = [(240 - 661) / 661] x 100
Subtract the new number by the original number
240 - 661 = -421
-421 ÷ 661 = -0.6369137670196672
-0.6369137670196672 x 100 = -63.69%