-29.67% is the change from 637 to 448
Calculation steps:
[( 448 - 637 ) ÷ 637] x 100 = -29.67%
Formula
Percentage change = [(448 - 637) / 637] x 100
Subtract the new number by the original number
448 - 637 = -189
-189 ÷ 637 = -0.2967032967032967
-0.2967032967032967 x 100 = -29.67%