-76.05% is the change from 643 to 154
Calculation steps:
[( 154 - 643 ) ÷ 643] x 100 = -76.05%
Formula
Percentage change = [(154 - 643) / 643] x 100
Subtract the new number by the original number
154 - 643 = -489
-489 ÷ 643 = -0.76049766718507
-0.76049766718507 x 100 = -76.05%