-74.75% is the change from 198 to 50
Calculation steps:
[( 50 - 198 ) ÷ 198] x 100 = -74.75%
Formula
Percentage change = [(50 - 198) / 198] x 100
Subtract the new number by the original number
50 - 198 = -148
-148 ÷ 198 = -0.7474747474747475
-0.7474747474747475 x 100 = -74.75%