-55.19% is the change from 770 to 345
Calculation steps:
[( 345 - 770 ) ÷ 770] x 100 = -55.19%
Formula
Percentage change = [(345 - 770) / 770] x 100
Subtract the new number by the original number
345 - 770 = -425
-425 ÷ 770 = -0.551948051948052
-0.551948051948052 x 100 = -55.19%