-57.87% is the change from 921 to 388
Calculation steps:
[( 388 - 921 ) ÷ 921] x 100 = -57.87%
Formula
Percentage change = [(388 - 921) / 921] x 100
Subtract the new number by the original number
388 - 921 = -533
-533 ÷ 921 = -0.5787187839305103
-0.5787187839305103 x 100 = -57.87%
Example