-2.73% is the change from 770 to 749
Calculation steps:
[( 749 - 770 ) ÷ 770] x 100 = -2.73%
Formula
Percentage change = [(749 - 770) / 770] x 100
Subtract the new number by the original number
749 - 770 = -21
-21 ÷ 770 = -0.02727272727272727
-0.02727272727272727 x 100 = -2.73%