-14.49% is the change from 642 to 549
Calculation steps:
[( 549 - 642 ) ÷ 642] x 100 = -14.49%
Formula
Percentage change = [(549 - 642) / 642] x 100
Subtract the new number by the original number
549 - 642 = -93
-93 ÷ 642 = -0.14485981308411214
-0.14485981308411214 x 100 = -14.49%