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The Watercooler
I should be in bed........but........
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<blockquote data-quote="Abbey" data-source="post: 219096" data-attributes="member: 179"><p>Percents? Like percents of a number? There is a formula I used to teach my students that you could figure out ANY word problem. I'm not sure I can type it in...but it goes like this:</p><p> </p><p>x/100 = sample/total (x being what percent. Parts always go on top, totals on bottom with 100 being the total percent)</p><p> </p><p>Example:</p><p> </p><p>x/100 = 24/53 (what percent of people voted for cruddy head kind of question. 24 out of 53 were sampled. Part over total)</p><p>(now cross multiply)</p><p>53x = 2400</p><p>(now isolate the variable by doing the inverse operation, which means divide each side by whatever number is attached to the variable. 53 divided by 53 gives you just the variable. 2400 divided by 53 is...well, I don't have a calculator handy, but it gives you the percent.)</p><p> </p><p>Or, you can substitute any variable in any spot.</p><p> </p><p>56/100 = x/432 (how many people out of the total were sampled. 56% of people voted this way out of 432. How many voted that way?)</p><p> </p><p>(Cross multiply)</p><p>100x = 12345 (not correct but no calc.)</p><p>(divide each side by 100 to isolate the variable)</p><p>x = 123.45</p><p> </p><p>I know this probably makes no sense. I'm not an internet teacher.<img src="/community/styles/default/xenforo/smilies/tongue.png" class="smilie" loading="lazy" alt=":tongue:" title="tongue :tongue:" data-shortname=":tongue:" /> But the main idea is there are many quick ways to get at an answer. You need to find one that works in ALL situations. Once you get it down...then you can customize and take shortcuts. It may take you longer, but you'll get there in the end.</p><p> </p><p>Ok. Math nerd here.</p><p> </p><p>Wish you well on your exams. I know it's stressful.</p><p> </p><p>Abbey</p></blockquote><p></p>
[QUOTE="Abbey, post: 219096, member: 179"] Percents? Like percents of a number? There is a formula I used to teach my students that you could figure out ANY word problem. I'm not sure I can type it in...but it goes like this: x/100 = sample/total (x being what percent. Parts always go on top, totals on bottom with 100 being the total percent) Example: x/100 = 24/53 (what percent of people voted for cruddy head kind of question. 24 out of 53 were sampled. Part over total) (now cross multiply) 53x = 2400 (now isolate the variable by doing the inverse operation, which means divide each side by whatever number is attached to the variable. 53 divided by 53 gives you just the variable. 2400 divided by 53 is...well, I don't have a calculator handy, but it gives you the percent.) Or, you can substitute any variable in any spot. 56/100 = x/432 (how many people out of the total were sampled. 56% of people voted this way out of 432. How many voted that way?) (Cross multiply) 100x = 12345 (not correct but no calc.) (divide each side by 100 to isolate the variable) x = 123.45 I know this probably makes no sense. I'm not an internet teacher.:raspberry-tounge: But the main idea is there are many quick ways to get at an answer. You need to find one that works in ALL situations. Once you get it down...then you can customize and take shortcuts. It may take you longer, but you'll get there in the end. Ok. Math nerd here. Wish you well on your exams. I know it's stressful. Abbey [/QUOTE]
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