-84.77% is the change from 197 to 30
Calculation steps:
[( 30 - 197 ) ÷ 197] x 100 = -84.77%
Formula
Percentage change = [(30 - 197) / 197] x 100
Subtract the new number by the original number
30 - 197 = -167
-167 ÷ 197 = -0.8477157360406091
-0.8477157360406091 x 100 = -84.77%