64.94% is the change from 231 to 381
Calculation steps:
[( 381 - 231 ) ÷ 231] x 100 = 64.94%
Formula
Percentage change = [(381 - 231) / 231] x 100
Subtract the new number by the original number
381 - 231 = 150
150 ÷ 231 = 0.6493506493506493
0.6493506493506493 x 100 = 64.94%