-92.4% is the change from 250 to 19
Calculation steps:
[( 19 - 250 ) ÷ 250] x 100 = -92.4%
Formula
Percentage change = [(19 - 250) / 250] x 100
Subtract the new number by the original number
19 - 250 = -231
-231 ÷ 250 = -0.924
-0.924 x 100 = -92.4%
Example