8 and 32.
8 times 4 = 32
32 - 8 = 24
4x - x = 24.
^ ^
1 2
1 kg = 2.20462 lbs
so 2.7 kg = 2.7(2.20462) = 5.952474....rounds to 5.95 lbs
It would be a 90%. In the calculator 18 is what percent of 20.
Simple...
you have:

and

Now, the first one is easy just divide it...

Now....

needs to be converted...
Multiply the whole number*denominator...
4*8=32
Now add the numerator....
32+3=35
Now use the original denominator...

Now divide...

Thus, your answer.
Your answer is 15, if you need help to figure out how I did that let me know.