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    LadyLou's Avatar
    LadyLou Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 20, 2012, 08:46 AM
    Estimate:26% of 81
    Estimate: 26% of 81 and 37% of 55
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Jan 20, 2012, 09:25 AM
    Hi LL... :)

    I certainly can't just give you the answer, but I can help you determine how to find it yourself, OK?

    Here, let's start at a basic rule of any math problem... let's ESTIMATE the answer.

    What is 25% of 100? 25% of 100 would be 25, right? What is 25% of 80? Well, 25% of 80 would be 20, wouldn't it? Ok, now we have a reasonable estimate to your first math problem... you can expect your answer to be near 20ish.

    Now we need to convert 26% to a number we can work with... that would be we would covert 26% to .26

    So, what is .26 x 81 = ?

    When calculated, is your answer super close to 20? If so, then you have a reasonable answer and you just checked it against your estimate so your answer MUST be correct.

    Now do this for 37% of 55. What do you get for an answer (remember to estimate your answer first)?

    Here is an online calculator to help you find the answers (click on link):

    Online calculator free for home, work, and school

    Good luck!

    Mark
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