345.71% is the change from 70 to 312
Calculation steps:
[( 312 - 70 ) ÷ 70] x 100 = 345.71%
Formula
Percentage change = [(312 - 70) / 70] x 100
Subtract the new number by the original number
312 - 70 = 242
242 ÷ 70 = 3.4571428571428573
3.4571428571428573 x 100 = 345.71%