49.4% is the change from 415 to 620
Calculation steps:
[( 620 - 415 ) ÷ 415] x 100 = 49.4%
Formula
Percentage change = [(620 - 415) / 415] x 100
Subtract the new number by the original number
620 - 415 = 205
205 ÷ 415 = 0.4939759036144578
0.4939759036144578 x 100 = 49.4%