Really easy math question (that I can't figure out)
 

17.13 is 1.5% of what number?

What's the answer, and the formula for that?

(I also need 4.32 is 2% of X
4.76 is 2.25% of X
.73 is .5% of X)

.015 * x = 17.13

1,142. Divide 17.13 by .015.

That was embarrassing. :)

whatever..i'm still trying to carry the 1. :D

One step bad.

More steps better.

How many times does 1.5% (0.015) go into 100% (1.00)? 66.6666666......

66.6666666... times 17.13 = 1,142

Carry the one.

Wanna look like a boss, you whip out your old slide rule and get with it.

+1 They had the TI calculator when I started college. The slide rule would be impressive today.

I was in accounting which is monkey math but when studying for the CPA exam I was able to do some pretty complex stuff in my head. 1983-ish.

Then (or thereabouts) the Mac and Compaqs (and Excel) became mainstream and all was lost.

Man, I used a slide rule in high school. Had to look up trig functions in a CRC handbook. I think they started selling the TI calculators when I got to about 10th grade. Have had one ever since...

I have no idea where my old slide rule went. I wouldn't mind having another just to screw around with it but they want silly money for decent ones on eBay, so not going to scratch that itch.

I have a couple of the programmable TI calculators with printers that I need to get on eBay before they are entirely worthless.

JR

<iframe width="560" height="315" src="https://www.youtube.com/embed/UIKGV2cTgqA?rel=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>

Vid (cute) made me think of a joke. Off topic but I'm old.

Comedian says he is overwhelmed with state tax returns because he does shows in so many different states.

He asks why can't they do it rather than him. Then he says "If I get robbed by five guys, they split up the money. It's a service they provide."

I've seen some stuff posted on the 'Net about "new math". Some of it doesn't make much sense at all. Some of it seems like it might maybe be a good way to explain math to much younger kids, and some of it makes a fair amount of sense. What I don't get is what the hell he was talking about. The way he did the subtraction problem seemed really weird to me. The way he explained the new math is basically the way that I've always done it and I'm 47.

Being 47, I missed the slide rule thing, but when I was 12, 13 or 14, my dad brought a Pickett slide rule home (it's sitting on my desk at work right now) and taught me how to use it. To this day, I think I can remember multiplication with the C and D registers. He also taught me different number systems like binary, base 4, base 8 and hexadecimal. I'm pretty sure I wrote a research paper on them. It's funny, because for the past 19 years, I've used the binary knowledge almost daily at work. I also use the hexadecimal a little bit. I'm much less fond of working in hex.

I also taught myself to use a Japanese style abacus. I think they are genius and kids should be taught to use them. I think it would help some folks with math. It's a slightly different way to visualize things.

One of the best "search engines" ever devised (IMHO):

https://www.wolframalpha.com/input/?i=17.13+is+1.5%25+of+what+number%3F

no need for calculators or anything

just without tools and calculators

17.13 / 3 *2*100
=
15+ 2.1 +0.03
/3
=
5+0.7+0.1
*2
=
10+1.4+0.2
= 11.42
*100
1142

.015x = 17.13
Divide both sides by .015 to get x alone
.015x/.015=17.13/.015
x=17.13/.015
x=1142

Common mistake heard on the news. “This just in - incidents of dumpster fires down 1% in June. Just 12% of our favorite crap containers went up in smoke, compaired to 13% last month.”

Tom Lehrer wrote that in the early 1960s

....Mclovin....i almost got it...

Says the guy building our bridges! :eek: