-58.5% is the change from 771 to 320
Calculation steps:
[( 320 - 771 ) ÷ 771] x 100 = -58.5%
Formula
Percentage change = [(320 - 771) / 771] x 100
Subtract the new number by the original number
320 - 771 = -451
-451 ÷ 771 = -0.5849546044098574
-0.5849546044098574 x 100 = -58.5%