-57.3% is the change from 644 to 275
Calculation steps:
[( 275 - 644 ) ÷ 644] x 100 = -57.3%
Formula
Percentage change = [(275 - 644) / 644] x 100
Subtract the new number by the original number
275 - 644 = -369
-369 ÷ 644 = -0.5729813664596274
-0.5729813664596274 x 100 = -57.3%