-21.77% is the change from 997 to 780
Calculation steps:
[( 780 - 997 ) ÷ 997] x 100 = -21.77%
Formula
Percentage change = [(780 - 997) / 997] x 100
Subtract the new number by the original number
780 - 997 = -217
-217 ÷ 997 = -0.2176529588766299
-0.2176529588766299 x 100 = -21.77%