-97.4% is the change from 423 to 11
Calculation steps:
[( 11 - 423 ) ÷ 423] x 100 = -97.4%
Formula
Percentage change = [(11 - 423) / 423] x 100
Subtract the new number by the original number
11 - 423 = -412
-412 ÷ 423 = -0.9739952718676123
-0.9739952718676123 x 100 = -97.4%