257.14% is the change from 84 to 300
Calculation steps:
[( 300 - 84 ) ÷ 84] x 100 = 257.14%
Formula
Percentage change = [(300 - 84) / 84] x 100
Subtract the new number by the original number
300 - 84 = 216
216 ÷ 84 = 2.5714285714285716
2.5714285714285716 x 100 = 257.14%