-67.13% is the change from 642 to 211
Calculation steps:
[( 211 - 642 ) ÷ 642] x 100 = -67.13%
Formula
Percentage change = [(211 - 642) / 642] x 100
Subtract the new number by the original number
211 - 642 = -431
-431 ÷ 642 = -0.6713395638629284
-0.6713395638629284 x 100 = -67.13%