207.14% is the change from 70 to 215
Calculation steps:
[( 215 - 70 ) ÷ 70] x 100 = 207.14%
Formula
Percentage change = [(215 - 70) / 70] x 100
Subtract the new number by the original number
215 - 70 = 145
145 ÷ 70 = 2.0714285714285716
2.0714285714285716 x 100 = 207.14%