-91.4% is the change from 221 to 19
Calculation steps:
[( 19 - 221 ) ÷ 221] x 100 = -91.4%
Formula
Percentage change = [(19 - 221) / 221] x 100
Subtract the new number by the original number
19 - 221 = -202
-202 ÷ 221 = -0.9140271493212669
-0.9140271493212669 x 100 = -91.4%