-51.5% is the change from 400 to 194
Calculation steps:
[( 194 - 400 ) ÷ 400] x 100 = -51.5%
Formula
Percentage change = [(194 - 400) / 400] x 100
Subtract the new number by the original number
194 - 400 = -206
-206 ÷ 400 = -0.515
-0.515 x 100 = -51.5%