-9.88% is the change from 506 to 456
Calculation steps:
[( 456 - 506 ) ÷ 506] x 100 = -9.88%
Formula
Percentage change = [(456 - 506) / 506] x 100
Subtract the new number by the original number
456 - 506 = -50
-50 ÷ 506 = -0.09881422924901186
-0.09881422924901186 x 100 = -9.88%