89.1% is the change from 312 to 590
Calculation steps:
[( 590 - 312 ) ÷ 312] x 100 = 89.1%
Formula
Percentage change = [(590 - 312) / 312] x 100
Subtract the new number by the original number
590 - 312 = 278
278 ÷ 312 = 0.8910256410256411
0.8910256410256411 x 100 = 89.1%