Penjelasan dengan langkah-langkah:

To prove that Lia's math test takes less time than Parjo, we need to compare the total time it takes for both of them to complete their math tests.

First, we need to convert Lia's time to minutes.

45 minutes 15 seconds = 45 + (15/60) = 45.25 minutes

Next, we need to convert Parjo's time to minutes.

55 minutes 30 seconds = 55 + (30/60) = 55.5 minutes

Now we can compare the two times:

Lia's time = 45.25 minutes

Parjo's time = 55.5 minutes

Since 45.25 is less than 55.5, we can conclude that Lia's math test takes less time than Parjo's.