-84.57% is the change from 635 to 98
Calculation steps:
[( 98 - 635 ) ÷ 635] x 100 = -84.57%
Formula
Percentage change = [(98 - 635) / 635] x 100
Subtract the new number by the original number
98 - 635 = -537
-537 ÷ 635 = -0.8456692913385827
-0.8456692913385827 x 100 = -84.57%