57.8 divided by 81 using compatible numbers to estimate?

Can't answer second part, but it's about 0.7135.

0.7 would be your ROUNDED answer.

0.7135 would be your ESTIMATED answer.

0.713580247 would be your EXACT answer.

How-To:

Use long division on a piece of paper, or use a calculator.

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.