Question a). Answer:
52% of the grid is shaded
Question a). Explanation:
As you can see there is a grid with 25 cubes. One cube has to equal the Denominator of 25/100, (simplified).
25 / 100 simplified equals 1/4.
Therefore, each cube equals 4.
(Quick check): When we do 25 x 4, does it equal 100? Yes. It has to equal 100 because percent is over 100.
When we count each cube, we have to add 4 on our work space.
There are 13 cubes. We add 4 13 times.
4 + 4 = 8 + 4 = 12 + 4 = 16 + 4 = 20 + 4 = 28 + 4 = 32 + 4 = 36 + 4 = 40 + 4 = 44 + 4 = 48 + 4 = 52.
As you can see, the sum is 52, then we put it as a Percent. 52%
A easier way is to count the cubes and find the number, then multiply by 4.
There are 13 cubes, then multiply by 4 13 x 4 = 52.
Question b). 7 more cubes.
Question b). Explanation:
We must look at the columns, there are 5 of them either way. Since percent is out of 100, how can 5 get to 100?
Yes, times 20!
Each column is 20%.
We need 4 columns to get 80%. We have 2 complete and 1 3/5 and 1 empty.
There are 5 in a column, so we have 5.
We need to subtract 3 / 5 from 5 / 5 to get our number, the numerator is the number we are looking for!
5 / 5 - 3 / 5 = 2 / 5.
That's 2 cubes.
Then add:
5 + 2 = 7.
Therefore, the answer is 7 cubes.
Best of Luck to you!
