-97.8% is the change from 773 to 17
Calculation steps:
[( 17 - 773 ) ÷ 773] x 100 = -97.8%
Formula
Percentage change = [(17 - 773) / 773] x 100
Subtract the new number by the original number
17 - 773 = -756
-756 ÷ 773 = -0.9780077619663649
-0.9780077619663649 x 100 = -97.8%