-79.13% is the change from 915 to 191
Calculation steps:
[( 191 - 915 ) ÷ 915] x 100 = -79.13%
Formula
Percentage change = [(191 - 915) / 915] x 100
Subtract the new number by the original number
191 - 915 = -724
-724 ÷ 915 = -0.7912568306010929
-0.7912568306010929 x 100 = -79.13%