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# Who can do this confusing maths question? watch

1. I keep getting 25% and that doesn't seem right?

After modification a car will do 25% more miles to gallon. Calculate the resulting percentage saving in fuel for a given journey.

I've wasted 20 minutes on this question...
2. I get 25 too
3. (Original post by Greentea1)
I keep getting 25% and that doesn't seem right?

After modification a car will do 25% more miles to gallon. Calculate the resulting percentage saving in fuel for a given journey.

I've wasted 20 minutes on this question...
You are correct in thinking 25 is wrong

Say you start with 100 miles taking 100 gallons costing 100 pounds

after your car will do 125 miles for 100 gallons costing 100 pounds

But your journey is still only 100 miles ... So, what is the new cost
4. (Original post by TenOfThem)
You are correct in thinking 25 is wrong

Say you start with 100 miles taking 100 gallons costing 100 pounds

after your car will do 125 miles for 100 gallons costing 100 pounds

But your journey is still only 100 miles ... So, what is the new cost

£80?
5. Wait, so you save 20%???
6. (Original post by Greentea1)
Wait, so you save 20%???
Yes
7. (Original post by TenOfThem)
Yes

You're amazing, thank you!

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