-15.88% is the change from 913 to 768
Calculation steps:
[( 768 - 913 ) ÷ 913] x 100 = -15.88%
Formula
Percentage change = [(768 - 913) / 913] x 100
Subtract the new number by the original number
768 - 913 = -145
-145 ÷ 913 = -0.1588170865279299
-0.1588170865279299 x 100 = -15.88%