-29.08% is the change from 643 to 456
Calculation steps:
[( 456 - 643 ) ÷ 643] x 100 = -29.08%
Formula
Percentage change = [(456 - 643) / 643] x 100
Subtract the new number by the original number
456 - 643 = -187
-187 ÷ 643 = -0.29082426127527217
-0.29082426127527217 x 100 = -29.08%