10650% is the change from 6 to 645
Calculation steps:
[( 645 - 6 ) ÷ 6] x 100 = 10650%
Formula
Percentage change = [(645 - 6) / 6] x 100
Subtract the new number by the original number
645 - 6 = 639
639 ÷ 6 = 106.5
106.5 x 100 = 10650%
Example