What is the percent increase when the value goes from $3 to $4?

To calculate the percent increase when a value changes from $3 to $4, you first find the difference between the new value and the old value. In this case, subtract the old value ($3) from the new value ($4), resulting in an increase of $1.

Next, to determine the percent increase, you take the increase ($1) and divide it by the original value ($3). This gives you a fraction:

[

\frac{1}{3}

]

To convert this fraction into a percentage, you multiply by 100:

[

\frac{1}{3} \times 100 \approx 33.33%

]

Thus, the percent increase from $3 to $4 is approximately 33.3%, making this option correct. The calculation shows how the increase compares to the original amount, which is essential when understanding percent changes in values.