Solve $\frac{52-40}{40}\times 100\%$

Step-by-step solution

1. Step 1 · Absolute change
   $$\Delta =52-40=12$$

   Find the difference before scaling it.

2. Step 2 · Divide by the original value
   $$\frac{12}{40}=0.3$$

   Percent change is always relative to the starting amount.

3. Step 3 · Convert to percent
   $$30\%$$

   Multiply the decimal by 100.