81.36% is the change from 177 to 321
Calculation steps:
[( 321 - 177 ) ÷ 177] x 100 = 81.36%
Formula
Percentage change = [(321 - 177) / 177] x 100
Subtract the new number by the original number
321 - 177 = 144
144 ÷ 177 = 0.8135593220338984
0.8135593220338984 x 100 = 81.36%