my friends niece has this problem and im trying to help her out so if anyone can help me and my friend's niece plz tell me cuz she is like failing math right now!!!
2006-12-12 14:03:22 · 20 answers · asked by bfscoobydoo22 2 in Science & Mathematics ➔ Mathematics
ratios are just like fractions.
just pretend 3:9 is 3/9 and 6:18 is 6/18.
reduce those fractions and viola.
both equals 1/3 other wise known as 1:3
2006-12-12 14:06:41 · answer #1 · answered by Hally K 2 · 0⤊ 0⤋
Ratios can be thought of as fractions. So here you'd have 3/9 compared to 6/18. If you reduce both you get 3/9=1/3 and 6/18=1/3 which shows that the ratios are equivalent.
2006-12-12 15:04:22 · answer #2 · answered by math help 1 · 0⤊ 0⤋
U would take 6/3 and 18/9, both of those have a factor of 2.
2006-12-12 14:06:08 · answer #3 · answered by The Voice Inside Your Head 3 · 0⤊ 0⤋
Well, first do 9/3, and you get 3, the opposite of the ratio. Then do 18/6, again it is 3. Since both ratio reciprocals are the same, then the ratios are the same.
2006-12-12 14:07:10 · answer #4 · answered by Richard 3 · 0⤊ 0⤋
the teacher is having you practice noticing that a group of numbers like (3:9) are half other numbers (6:18).
At school you get used to the idea that 9 is half of 18 then when you see a ratio question you know these are just different ways of saying the same ratio. a same ratio is an equivalent ratio.
It's like it just says
three is to nine
like
six is to eighteen
you notice that each one is just saying
a third of a number
is like
a third of a different number
what are they both saying: a third
Lola's answer is awesome if you remember her way of doing ratios
2006-12-12 14:10:42 · answer #5 · answered by treonbarleyverdery 3 · 0⤊ 0⤋
If you can divide or multiply both sides of one of the ratios by the same number and get the other ratio, they are equivalent (6:18 divided by 2=3:9).
2006-12-12 14:06:34 · answer #6 · answered by Peeps 3 · 0⤊ 0⤋
3:9 and 6:18
For doing mental math one has to learn tables, learning up to 20 times table is good enough.
Not only reciting the table in order, but reciting it in reverse order also helps. One should be able to instantly give answer to any combination of multiplication within the 2 to 20 times table.
Once you have learned the tables well, just by looking at 3 and 6, and 9 and 18 one knows they are related by a common factor of 2. Hence equivalent ratio.
Learning the table is time consuming but you learn it for life. It is worth the efforts in the long run.
2006-12-12 15:06:14 · answer #7 · answered by sudhir49garg 2 · 0⤊ 0⤋
3:9 or 3/9 is equivalent to 6:18 or 6/18 because if you multiply any fraction (numerator and denominator) by any number, the resultant fraction will be equivalent.
In this case, 3 (numerator) x 2 = 6,
and 9 (denominator) x 2 = 18.
You can multiply by any number, and the fraction will be equivalent. Hope it helps.
2006-12-12 14:10:35 · answer #8 · answered by dannilug 3 · 0⤊ 0⤋
Divide the left side of the larger by the left side of the smaller: 6 divided by 3 = 2. Then divide the right side of the larger by the right side of the smaller: 18 divided by 9 = 2. If those two answers are the same, the proportions are equivalent. If not, they are not equivalent.
2006-12-12 14:07:58 · answer #9 · answered by Christmas Light Seeker 1 · 0⤊ 0⤋
Merely double the quantities in the first ratio.
3:9 = 6:18
You can also set it up as 3/9=6/18
Which ever is easier for your friend's niece.
2006-12-12 14:08:41 · answer #10 · answered by LeAnne 7 · 0⤊ 1⤋