Alright so we can round up 7.51 to 8 since we're just estimating.
And we can make 239.63 into 240.
Then we can think how many times we think 8 would go into 240.
To simply even farther we can take off the zero and then put it back in later.
So 24 divided by 8 = 3
Now we can add back in the zero making the answer 30