-33.07% is the change from 644 to 431
Calculation steps:
[( 431 - 644 ) ÷ 644] x 100 = -33.07%
Formula
Percentage change = [(431 - 644) / 644] x 100
Subtract the new number by the original number
431 - 644 = -213
-213 ÷ 644 = -0.3307453416149068
-0.3307453416149068 x 100 = -33.07%