-19.78% is the change from 915 to 734
Calculation steps:
[( 734 - 915 ) ÷ 915] x 100 = -19.78%
Formula
Percentage change = [(734 - 915) / 915] x 100
Subtract the new number by the original number
734 - 915 = -181
-181 ÷ 915 = -0.19781420765027322
-0.19781420765027322 x 100 = -19.78%