-95.34% is the change from 644 to 30
Calculation steps:
[( 30 - 644 ) ÷ 644] x 100 = -95.34%
Formula
Percentage change = [(30 - 644) / 644] x 100
Subtract the new number by the original number
30 - 644 = -614
-614 ÷ 644 = -0.953416149068323
-0.953416149068323 x 100 = -95.34%