50.6% is the change from 664 to 1000
Calculation steps:
[( 1000 - 664 ) ÷ 664] x 100 = 50.6%
Formula
Percentage change = [(1000 - 664) / 664] x 100
Subtract the new number by the original number
1000 - 664 = 336
336 ÷ 664 = 0.5060240963855421
0.5060240963855421 x 100 = 50.6%