1240% is the change from 10 to 134
Calculation steps:
[( 134 - 10 ) ÷ 10] x 100 = 1240%
Formula
Percentage change = [(134 - 10) / 10] x 100
Subtract the new number by the original number
134 - 10 = 124
124 ÷ 10 = 12.4
12.4 x 100 = 1240%
Example