-15.92% is the change from 647 to 544
Calculation steps:
[( 544 - 647 ) ÷ 647] x 100 = -15.92%
Formula
Percentage change = [(544 - 647) / 647] x 100
Subtract the new number by the original number
544 - 647 = -103
-103 ÷ 647 = -0.15919629057187018
-0.15919629057187018 x 100 = -15.92%