-84.7% is the change from 634 to 97
Calculation steps:
[( 97 - 634 ) ÷ 634] x 100 = -84.7%
Formula
Percentage change = [(97 - 634) / 634] x 100
Subtract the new number by the original number
97 - 634 = -537
-537 ÷ 634 = -0.8470031545741324
-0.8470031545741324 x 100 = -84.7%