Answer: He earns $225 by mowing lawns
Explanation:
The amount saved by Patrick= $500
The percentage of money he earn by mowing lawns=
![100\%-25\%-30\%=45\%](https://img.qammunity.org/2020/formulas/mathematics/high-school/9uea5xxholn983ql9tvdlrf8o90vr8qd9d.png)
Then the amount of money he earns by mowing lawns=
![45\%\ of\ 500](https://img.qammunity.org/2020/formulas/mathematics/high-school/cxn6t65d90te7wv0hjo76ewdorrassy700.png)
⇒ The amount of money he earns by mowing lawns=
![0.45*500=\$225](https://img.qammunity.org/2020/formulas/mathematics/high-school/41e7xc9kl1qbcac4eqovasknnyal13nvvw.png)
Hence, The amount of his savings he earns by mowing lawns= $225