215% is the change from 300 to 945
Calculation steps:
[( 945 - 300 ) ÷ 300] x 100 = 215%
Formula
Percentage change = [(945 - 300) / 300] x 100
Subtract the new number by the original number
945 - 300 = 645
645 ÷ 300 = 2.15
2.15 x 100 = 215%
Example