172.73% is the change from 99 to 270
Calculation steps:
[( 270 - 99 ) ÷ 99] x 100 = 172.73%
Formula
Percentage change = [(270 - 99) / 99] x 100
Subtract the new number by the original number
270 - 99 = 171
171 ÷ 99 = 1.7272727272727273
1.7272727272727273 x 100 = 172.73%
Example