Lets write this in fraction form 1st. (3 out of 25)

Now we will turn

into a decimal. To do this we will divide the numerator by the denominator.
3 ÷ 25 = 0.12
Now to change 0.12 to a fraction we will multiply by 100.
0.12 × 100 = 12
12%
So,
12% are left-handed.
Hope I helped ya!!!!!!!!!