-78.29% is the change from 456 to 99
Calculation steps:
[( 99 - 456 ) ÷ 456] x 100 = -78.29%
Formula
Percentage change = [(99 - 456) / 456] x 100
Subtract the new number by the original number
99 - 456 = -357
-357 ÷ 456 = -0.7828947368421053
-0.7828947368421053 x 100 = -78.29%