98.8% is the change from 334 to 664
Calculation steps:
[( 664 - 334 ) ÷ 334] x 100 = 98.8%
Formula
Percentage change = [(664 - 334) / 334] x 100
Subtract the new number by the original number
664 - 334 = 330
330 ÷ 334 = 0.9880239520958084
0.9880239520958084 x 100 = 98.8%