51.71% is the change from 321 to 487
Calculation steps:
[( 487 - 321 ) ÷ 321] x 100 = 51.71%
Formula
Percentage change = [(487 - 321) / 321] x 100
Subtract the new number by the original number
487 - 321 = 166
166 ÷ 321 = 0.5171339563862928
0.5171339563862928 x 100 = 51.71%