-7.63% is the change from 642 to 593
Calculation steps:
[( 593 - 642 ) ÷ 642] x 100 = -7.63%
Formula
Percentage change = [(593 - 642) / 642] x 100
Subtract the new number by the original number
593 - 642 = -49
-49 ÷ 642 = -0.0763239875389408
-0.0763239875389408 x 100 = -7.63%