SOLUTION: The ratio of the number of junior high students to the number ofsenior high students in
a school is 7 to 9. If there are 100 more senior high students thanjunior high students,
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-> SOLUTION: The ratio of the number of junior high students to the number ofsenior high students in
a school is 7 to 9. If there are 100 more senior high students thanjunior high students,
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Question 979640: The ratio of the number of junior high students to the number ofsenior high students in
a school is 7 to 9. If there are 100 more senior high students thanjunior high students,
how many junior high students are there? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! 7:9 is the ratio.
7/16 students are jr.
x=jr high
x+100=sr. high
x/x+100 = 7/9
cross-multiply
9x=7(x+100)
9x=7x+700
2x=700
x=350
x+100=450
800 students in all
350/450 =7/9, if one divides both numbers by 50.
