-97.54% is the change from 771 to 19
Calculation steps:
[( 19 - 771 ) ÷ 771] x 100 = -97.54%
Formula
Percentage change = [(19 - 771) / 771] x 100
Subtract the new number by the original number
19 - 771 = -752
-752 ÷ 771 = -0.9753566796368353
-0.9753566796368353 x 100 = -97.54%