210% is the change from 300 to 930
Calculation steps:
[( 930 - 300 ) ÷ 300] x 100 = 210%
Formula
Percentage change = [(930 - 300) / 300] x 100
Subtract the new number by the original number
930 - 300 = 630
630 ÷ 300 = 2.1
2.1 x 100 = 210%
Example