66.39% is the change from 601 to 1000
Calculation steps:
[( 1000 - 601 ) ÷ 601] x 100 = 66.39%
Formula
Percentage change = [(1000 - 601) / 601] x 100
Subtract the new number by the original number
1000 - 601 = 399
399 ÷ 601 = 0.6638935108153078
0.6638935108153078 x 100 = 66.39%