-17.79% is the change from 787 to 647
Calculation steps:
[( 647 - 787 ) ÷ 787] x 100 = -17.79%
Formula
Percentage change = [(647 - 787) / 787] x 100
Subtract the new number by the original number
647 - 787 = -140
-140 ÷ 787 = -0.17789072426937738
-0.17789072426937738 x 100 = -17.79%