Discover answers to your questions with Westonci.ca, the leading Q&A platform that connects you with knowledgeable experts. Ask your questions and receive accurate answers from professionals with extensive experience in various fields on our platform. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

128 is 74% of what number?

Sagot :

You could write a proportion:[tex]\\\frac{74}{100}=\frac{128}{x}\\ cross~multiply~and~divide.\\ 128\times100=12800\\12800\div74=172.9\\[/tex] 128 is 74% of 172.9.
If we know that 128 is 74% of something, we can write it like this:

74%x=128.

If we take the percent away (percent means by hundred in latin, 1%=1/100), we'll have

74/100 *x=128


 //let's multiply both sides by 100, that way we can get rid of the ugly "/100 because 100/100 = 1, and we can ignore 1 in multiplications

100*74/100 *x = 128 *100//             let's simplify the left side: 100/100=1
74*x=128*100//            let's calculate the right side now
74*x=12800// now we have to divide both sides by 74

x=12800/74

if we divde this, we have: 172 + 72/74. (why? see below)
We can simplify the fraction by division by 2: 172 36/37


00172
_______
12800:74
 -74
___
   540
 - 518
 -------
      220
      148
_________
         72