-47.34% is the change from 921 to 485
Calculation steps:
[( 485 - 921 ) ÷ 921] x 100 = -47.34%
Formula
Percentage change = [(485 - 921) / 921] x 100
Subtract the new number by the original number
485 - 921 = -436
-436 ÷ 921 = -0.4733984799131379
-0.4733984799131379 x 100 = -47.34%