-18.12% is the change from 938 to 768
Calculation steps:
[( 768 - 938 ) ÷ 938] x 100 = -18.12%
Formula
Percentage change = [(768 - 938) / 938] x 100
Subtract the new number by the original number
768 - 938 = -170
-170 ÷ 938 = -0.1812366737739872
-0.1812366737739872 x 100 = -18.12%