-93.38% is the change from 770 to 51
Calculation steps:
[( 51 - 770 ) ÷ 770] x 100 = -93.38%
Formula
Percentage change = [(51 - 770) / 770] x 100
Subtract the new number by the original number
51 - 770 = -719
-719 ÷ 770 = -0.9337662337662338
-0.9337662337662338 x 100 = -93.38%