88.89% is the change from 324 to 612
Calculation steps:
[( 612 - 324 ) ÷ 324] x 100 = 88.89%
Formula
Percentage change = [(612 - 324) / 324] x 100
Subtract the new number by the original number
612 - 324 = 288
288 ÷ 324 = 0.8888888888888888
0.8888888888888888 x 100 = 88.89%