858.59% is the change from 99 to 949
Calculation steps:
[( 949 - 99 ) ÷ 99] x 100 = 858.59%
Formula
Percentage change = [(949 - 99) / 99] x 100
Subtract the new number by the original number
949 - 99 = 850
850 ÷ 99 = 8.585858585858587
8.585858585858587 x 100 = 858.59%