math question

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I am stuck and can not solve this problem

1/2-1/1.9 Please help

I saw your other post too. You can't round this because rounding changes the #.

The best way to solve is to multiply by a fraction that is equivalent to 1, such as multiplying 1/2 x 1.9/1.9 which is 1.9/3.8, now multiply 1/1.9 x 2/2 which is 2/3.8

2/3.8 - 1.9/3.8 is the same as 2-1.9 / 3.8 = 0.1/3.8

Now 1/f = 1/38
 

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