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which is the more accurate way to estimate 48% of 23

 Feb 11, 2020
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< which is the more accurate way to estimate 48% of 23 >     

 

I'm taking you at your word you mean estimate, rather than calculate. 

 

Here's what I do.  I see that .48 is the same as .50 – .02  

 

In my head I take .50 of 23  ......       11.50 

 

Simultaneously take .02 of 23  .......     .46     (i.e., 2 x 23 is 46 then move the decimal point two to the left)

 

This I just subtract 11.50 – .46 and get 11.04   

 

This one was simple and happened to come out exact.  

The same approach works with other values with possibly less accuracy. 

.

 Feb 11, 2020

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