-53.86% is the change from 661 to 305
Calculation steps:
[( 305 - 661 ) ÷ 661] x 100 = -53.86%
Formula
Percentage change = [(305 - 661) / 661] x 100
Subtract the new number by the original number
305 - 661 = -356
-356 ÷ 661 = -0.5385779122541604
-0.5385779122541604 x 100 = -53.86%