308.24% is the change from 85 to 347
Calculation steps:
[( 347 - 85 ) ÷ 85] x 100 = 308.24%
Formula
Percentage change = [(347 - 85) / 85] x 100
Subtract the new number by the original number
347 - 85 = 262
262 ÷ 85 = 3.0823529411764707
3.0823529411764707 x 100 = 308.24%