Question

How do you write as a fraction and simplify 0.125?

Answer 1

`1/8`

Explanation:

The third decimal place is thousandths so as a starting point write this as:

`125/1000 -=(125-:125)/(1000-:125)= 1/8`

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Comment about 1 of many approaches to do with mental arithmetic.

Not that `4xx25=100` so think of 125 as `100+100/4`

`(100+100/4)xx8 = (800+800/4) = 800+200=1000`