6. In 2020 , summer camp registration was \( \$ 15 \) more than it was in 2021 . In 2020 , registration was \( \$ 285 \). By what percentage did the summer camp registration decrease in 2021 ?

To find the summer camp registration in 2021, we subtract the \$15 increase from the 2020 registration fee of \$285. Thus, in 2021, the registration cost was \( \$285 - \$15 = \$270 \). Next, to find the percentage decrease, we calculate the difference in registration fees: \( \$285 - \$270 = \$15 \). Now, we divide the decrease by the original value in 2020 and multiply by 100 to convert it to a percentage: \[ \text{Percentage Decrease} = \left( \frac{\$15}{\$285} \right) \times 100 \approx 5.26\% \] So, the summer camp registration decreased by approximately 5.26% in 2021.