271.43% is the change from 70 to 260
Calculation steps:
[( 260 - 70 ) ÷ 70] x 100 = 271.43%
Formula
Percentage change = [(260 - 70) / 70] x 100
Subtract the new number by the original number
260 - 70 = 190
190 ÷ 70 = 2.7142857142857144
2.7142857142857144 x 100 = 271.43%