-69.78% is the change from 642 to 194
Calculation steps:
[( 194 - 642 ) ÷ 642] x 100 = -69.78%
Formula
Percentage change = [(194 - 642) / 642] x 100
Subtract the new number by the original number
194 - 642 = -448
-448 ÷ 642 = -0.6978193146417445
-0.6978193146417445 x 100 = -69.78%