-49.21% is the change from 632 to 321
Calculation steps:
[( 321 - 632 ) ÷ 632] x 100 = -49.21%
Formula
Percentage change = [(321 - 632) / 632] x 100
Subtract the new number by the original number
321 - 632 = -311
-311 ÷ 632 = -0.4920886075949367
-0.4920886075949367 x 100 = -49.21%