Jason is saving up for a skateboard and helmet. the skateboard is $45.50 with tax and the helmet is $18.25 with tax. he earned 1/3 of the money by mowing lawns and the rest by babysitting. how much did Jason earn babaysitting

To find out how much Jason earned babysitting, we first need to calculate the total cost of the skateboard and helmet.

1. **Total Cost:**
- Skateboard: $45.50
- Helmet: $18.25

\[
\text{Total Cost} = \text{Skateboard} + \text{Helmet} = 45.50 + 18.25 = 63.75
\]

2. **Amount Earned from Mowing Lawns:**
Jason earned \( \frac{1}{3} \) of the total amount through mowing lawns.

\[
\text{Amount from Mowing Lawns} = \frac{1}{3} \times 63.75
\]

To calculate that:

\[
\frac{1}{3} \times 63.75 = 21.25
\]

3. **Amount Earned Babysitting:**
The rest of the money was earned through babysitting, which is \( \frac{2}{3} \) of the total amount.

\[
\text{Amount from Babysitting} = \text{Total Cost} - \text{Amount from Mowing Lawns}
\]
\[
\text{Amount from Babysitting} = 63.75 - 21.25 = 42.50
\]

Thus, Jason earned **$42.50** babysitting.