-6.96% is the change from 690 to 642
Calculation steps:
[( 642 - 690 ) ÷ 690] x 100 = -6.96%
Formula
Percentage change = [(642 - 690) / 690] x 100
Subtract the new number by the original number
642 - 690 = -48
-48 ÷ 690 = -0.06956521739130435
-0.06956521739130435 x 100 = -6.96%