70.63% is the change from 320 to 546
Calculation steps:
[( 546 - 320 ) ÷ 320] x 100 = 70.63%
Formula
Percentage change = [(546 - 320) / 320] x 100
Subtract the new number by the original number
546 - 320 = 226
226 ÷ 320 = 0.70625
0.70625 x 100 = 70.63%