305.71% is the change from 70 to 284
Calculation steps:
[( 284 - 70 ) ÷ 70] x 100 = 305.71%
Formula
Percentage change = [(284 - 70) / 70] x 100
Subtract the new number by the original number
284 - 70 = 214
214 ÷ 70 = 3.057142857142857
3.057142857142857 x 100 = 305.71%