150% is the change from 210 to 525
Calculation steps:
[( 525 - 210 ) ÷ 210] x 100 = 150%
Formula
Percentage change = [(525 - 210) / 210] x 100
Subtract the new number by the original number
525 - 210 = 315
315 ÷ 210 = 1.5
1.5 x 100 = 150%
Example