-71.22% is the change from 768 to 221
Calculation steps:
[( 221 - 768 ) ÷ 768] x 100 = -71.22%
Formula
Percentage change = [(221 - 768) / 768] x 100
Subtract the new number by the original number
221 - 768 = -547
-547 ÷ 768 = -0.7122395833333334
-0.7122395833333334 x 100 = -71.22%