153.66% is the change from 123 to 312
Calculation steps:
[( 312 - 123 ) ÷ 123] x 100 = 153.66%
Formula
Percentage change = [(312 - 123) / 123] x 100
Subtract the new number by the original number
312 - 123 = 189
189 ÷ 123 = 1.5365853658536586
1.5365853658536586 x 100 = 153.66%