-59.09% is the change from 770 to 315
Calculation steps:
[( 315 - 770 ) ÷ 770] x 100 = -59.09%
Formula
Percentage change = [(315 - 770) / 770] x 100
Subtract the new number by the original number
315 - 770 = -455
-455 ÷ 770 = -0.5909090909090909
-0.5909090909090909 x 100 = -59.09%