Benni wants to divide 48.6 by 0.7. in order to estimate the quotient, which is the best expression to use?

We know that
There are many strategies that we could use. We will use compatible numbers for this problem.

step 1
Multiply the divisor and dividend by 10.
48.6*10=486
0.7*10=7

step 2
The number 486 is close to 490
The numbers 7 and 490 are compatible since they make it easy to do mental arithmetic.

step 3
estimate the quotient

quotient=.dividend/divisor
quotient=490/7> 70

the answer is
the best expression to use is (490/7)