Working with Fractions
Most modern calculators have a most useful button, .
It is well worth making its acquaintance.
Worked examples.
1. Convert to a decimal.
7 16 = displays the fraction as 7
16
Pressing the fraction button again gives 0.4375
If you continue pressing the button the display toggles back and forth
between 0.4375 and 7
16
2. Convert 0.45 to its simplest fraction.
This is easy when you realize
0.45 is
Enter 45 100 =
The answer, 9 20,
means
“nine twentieths.”
Wait.
There is more.
Keep pressing the button.
The answer will toggle backwards
and forwards between
the decimal format 0.45 and the fraction
format 9 20.
That is a handy check that the decimal was entered correctly.
3. Convert 0.36 to its simplest fraction.
Let’s suppose you hadn’t
immediately recognised 0.36 as
No matter.
0.36 is +
since the first digit after the decimal point
is tenths and the second is hundredths.
Enter 3 10 + 6
100 =
The answer, 9 25,
means
“
Have fun and let me know how easy this is to read.
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