-2.72% is the change from 771 to 750
Calculation steps:
[( 750 - 771 ) ÷ 771] x 100 = -2.72%
Formula
Percentage change = [(750 - 771) / 771] x 100
Subtract the new number by the original number
750 - 771 = -21
-21 ÷ 771 = -0.027237354085603113
-0.027237354085603113 x 100 = -2.72%