Assuming you want the expression to be simplified.
We begin with the following:

Simplify the first part,

. That is 25. Now we have this:
Next, simplify

, which is 1/3, and get this:
The next part is

. Simplify the denominator,

, which is 81. Simplify the numerator, which is 1/125. Then divide 1/125 by 81, which we will keep as a fraction for simplicity's sake, but simplify it to

. Now we have:

Now simplify

, which is 0.2, or 1/5. Now we have:
Finally, simplify

. That is 1/27. We have:

Lastly, multiply them all together! Now we are done, with the product of:

That certainly did take a while to type in all the LaTex, so I really hope that helped!
Note- if anything isn't working with the LaTex, just tell me and I'll fix it! (:
Answer:
70%
Step-by-step explanation:
Since it can't go over 100%, and our numbers are 7 and 3, they are 70% and 30%, which add up to 100%.
Answer:
1988 years ago.
Historians have never included a year zero, and it isn't common practice to include it.
Hope this helps,
Azumayay
Answer: D
Step-by-step explanation: payment equals to money earned per hour (p=6.25h).
Answer: 4 cakes
Explanation: 2/3 is equal to 4/6. Each cake only takes 1/6 lbs. of sugar