Alexander owns $125 from her paper route each one but she spends about $20 each month on her personal expense to pay for a school field trip that cost $800 about how many months does she need to save money

If I am reading the question correctly, it would take her 40 months. 800$:20$ per month = 40 total months.

The answer would be 7.62 months. $125-$20 per month = $105 savings per month. If you need $800, and you save $105 per month, it would take you 7.62 months to earn $800.

$800 divided by $105 = 7.62 months. And if you are rounding to the nearest month, it would be 8 months.