-23.8% is the change from 647 to 493
Calculation steps:
[( 493 - 647 ) ÷ 647] x 100 = -23.8%
Formula
Percentage change = [(493 - 647) / 647] x 100
Subtract the new number by the original number
493 - 647 = -154
-154 ÷ 647 = -0.23802163833075735
-0.23802163833075735 x 100 = -23.8%