Answer:
To work out the percentage, all you have to do is divide the first subject by the second and multiply that by 100%.
In other words, 
= 
=
.
Step-by-step explanation:
Hope this helped!
Answer:
5 millicuries
Step-by-step explanation:
Half life is 7 days which means it will be at 10 millicuries if we half that again for another 7 days then it will be 5.
Answer:
The third number is 47.
Step-by-step explanation:
The sum of three numbers is 3068 - this can be expressed mathematically as:

Given that two of the numbers are 1266 and 1755 (in order) then substitute x = 1266 and y = 1755:

Find the third number - solve for z-variable:

Therefore, the third number is 47.
Answer:
0.032
Step-by-step explanation:
0.2/100×16
=0.032
percentage can be written as percentage/100