428.57% is the change from 70 to 370
Calculation steps:
[( 370 - 70 ) ÷ 70] x 100 = 428.57%
Formula
Percentage change = [(370 - 70) / 70] x 100
Subtract the new number by the original number
370 - 70 = 300
300 ÷ 70 = 4.285714285714286
4.285714285714286 x 100 = 428.57%