-95.92% is the change from 661 to 27
Calculation steps:
[( 27 - 661 ) ÷ 661] x 100 = -95.92%
Formula
Percentage change = [(27 - 661) / 661] x 100
Subtract the new number by the original number
27 - 661 = -634
-634 ÷ 661 = -0.9591527987897126
-0.9591527987897126 x 100 = -95.92%