-2.47% is the change from 770 to 751
Calculation steps:
[( 751 - 770 ) ÷ 770] x 100 = -2.47%
Formula
Percentage change = [(751 - 770) / 770] x 100
Subtract the new number by the original number
751 - 770 = -19
-19 ÷ 770 = -0.024675324675324677
-0.024675324675324677 x 100 = -2.47%