284.62% is the change from 78 to 300
Calculation steps:
[( 300 - 78 ) ÷ 78] x 100 = 284.62%
Formula
Percentage change = [(300 - 78) / 78] x 100
Subtract the new number by the original number
300 - 78 = 222
222 ÷ 78 = 2.8461538461538463
2.8461538461538463 x 100 = 284.62%