-91.65% is the change from 647 to 54
Calculation steps:
[( 54 - 647 ) ÷ 647] x 100 = -91.65%
Formula
Percentage change = [(54 - 647) / 647] x 100
Subtract the new number by the original number
54 - 647 = -593
-593 ÷ 647 = -0.9165378670788253
-0.9165378670788253 x 100 = -91.65%