150% is the change from 84 to 210
Calculation steps:
[( 210 - 84 ) ÷ 84] x 100 = 150%
Formula
Percentage change = [(210 - 84) / 84] x 100
Subtract the new number by the original number
210 - 84 = 126
126 ÷ 84 = 1.5
1.5 x 100 = 150%
Example