61.5% is the change from 213 to 344
Calculation steps:
[( 344 - 213 ) ÷ 213] x 100 = 61.5%
Formula
Percentage change = [(344 - 213) / 213] x 100
Subtract the new number by the original number
344 - 213 = 131
131 ÷ 213 = 0.6150234741784038
0.6150234741784038 x 100 = 61.5%