-17.99% is the change from 806 to 661
Calculation steps:
[( 661 - 806 ) ÷ 806] x 100 = -17.99%
Formula
Percentage change = [(661 - 806) / 806] x 100
Subtract the new number by the original number
661 - 806 = -145
-145 ÷ 806 = -0.17990074441687345
-0.17990074441687345 x 100 = -17.99%