-27.6% is the change from 913 to 661
Calculation steps:
[( 661 - 913 ) ÷ 913] x 100 = -27.6%
Formula
Percentage change = [(661 - 913) / 913] x 100
Subtract the new number by the original number
661 - 913 = -252
-252 ÷ 913 = -0.276013143483023
-0.276013143483023 x 100 = -27.6%