296.55% is the change from 87 to 345
Calculation steps:
[( 345 - 87 ) ÷ 87] x 100 = 296.55%
Formula
Percentage change = [(345 - 87) / 87] x 100
Subtract the new number by the original number
345 - 87 = 258
258 ÷ 87 = 2.9655172413793105
2.9655172413793105 x 100 = 296.55%