-50.6% is the change from 913 to 451
Calculation steps:
[( 451 - 913 ) ÷ 913] x 100 = -50.6%
Formula
Percentage change = [(451 - 913) / 913] x 100
Subtract the new number by the original number
451 - 913 = -462
-462 ÷ 913 = -0.5060240963855421
-0.5060240963855421 x 100 = -50.6%