61.22% is the change from 343 to 553
Calculation steps:
[( 553 - 343 ) ÷ 343] x 100 = 61.22%
Formula
Percentage change = [(553 - 343) / 343] x 100
Subtract the new number by the original number
553 - 343 = 210
210 ÷ 343 = 0.6122448979591837
0.6122448979591837 x 100 = 61.22%