-77.59% is the change from 647 to 145
Calculation steps:
[( 145 - 647 ) ÷ 647] x 100 = -77.59%
Formula
Percentage change = [(145 - 647) / 647] x 100
Subtract the new number by the original number
145 - 647 = -502
-502 ÷ 647 = -0.7758887171561051
-0.7758887171561051 x 100 = -77.59%