471.43% is the change from 70 to 400
Calculation steps:
[( 400 - 70 ) ÷ 70] x 100 = 471.43%
Formula
Percentage change = [(400 - 70) / 70] x 100
Subtract the new number by the original number
400 - 70 = 330
330 ÷ 70 = 4.714285714285714
4.714285714285714 x 100 = 471.43%