1000% is the change from 27 to 297
Calculation steps:
[( 297 - 27 ) ÷ 27] x 100 = 1000%
Formula
Percentage change = [(297 - 27) / 27] x 100
Subtract the new number by the original number
297 - 27 = 270
270 ÷ 27 = 10
10 x 100 = 1000%
Example