-17.98% is the change from 951 to 780
Calculation steps:
[( 780 - 951 ) ÷ 951] x 100 = -17.98%
Formula
Percentage change = [(780 - 951) / 951] x 100
Subtract the new number by the original number
780 - 951 = -171
-171 ÷ 951 = -0.17981072555205047
-0.17981072555205047 x 100 = -17.98%