Question

3. John has a bag of marbles. The ratio

of red marbles to blue marbles is 3:7.
What percent of the marbles are red?

Answer 1

Explanation:

percentage is taken as out of 100 we have to do like this for finding any percentage for any given ratio.

add the given ration 7+3=10

now as ratio is given from red to blue so we have red=3 and blue=7.

now final step is that simply do this.....

if 10(total) is equal to 100 %

then 3(for red) is equal how many percentage?

so we know that it will be (3 x 100) / 10 = 30%

so 30 percent of marbles are red.