-76.2% is the change from 647 to 154
Calculation steps:
[( 154 - 647 ) ÷ 647] x 100 = -76.2%
Formula
Percentage change = [(154 - 647) / 647] x 100
Subtract the new number by the original number
154 - 647 = -493
-493 ÷ 647 = -0.7619783616692427
-0.7619783616692427 x 100 = -76.2%