-78.8% is the change from 915 to 194
Calculation steps:
[( 194 - 915 ) ÷ 915] x 100 = -78.8%
Formula
Percentage change = [(194 - 915) / 915] x 100
Subtract the new number by the original number
194 - 915 = -721
-721 ÷ 915 = -0.7879781420765027
-0.7879781420765027 x 100 = -78.8%