270% is the change from 70 to 259
Calculation steps:
[( 259 - 70 ) ÷ 70] x 100 = 270%
Formula
Percentage change = [(259 - 70) / 70] x 100
Subtract the new number by the original number
259 - 70 = 189
189 ÷ 70 = 2.7
2.7 x 100 = 270%
Example