-17.68% is the change from 786 to 647
Calculation steps:
[( 647 - 786 ) ÷ 786] x 100 = -17.68%
Formula
Percentage change = [(647 - 786) / 786] x 100
Subtract the new number by the original number
647 - 786 = -139
-139 ÷ 786 = -0.17684478371501272
-0.17684478371501272 x 100 = -17.68%