-67.36% is the change from 677 to 221
Calculation steps:
[( 221 - 677 ) ÷ 677] x 100 = -67.36%
Formula
Percentage change = [(221 - 677) / 677] x 100
Subtract the new number by the original number
221 - 677 = -456
-456 ÷ 677 = -0.6735598227474151
-0.6735598227474151 x 100 = -67.36%