-14.17% is the change from 642 to 551
Calculation steps:
[( 551 - 642 ) ÷ 642] x 100 = -14.17%
Formula
Percentage change = [(551 - 642) / 642] x 100
Subtract the new number by the original number
551 - 642 = -91
-91 ÷ 642 = -0.14174454828660435
-0.14174454828660435 x 100 = -14.17%