-53.56% is the change from 661 to 307
Calculation steps:
[( 307 - 661 ) ÷ 661] x 100 = -53.56%
Formula
Percentage change = [(307 - 661) / 661] x 100
Subtract the new number by the original number
307 - 661 = -354
-354 ÷ 661 = -0.5355521936459909
-0.5355521936459909 x 100 = -53.56%