Use this code. Here is a working example http://plnkr.co/edit/xnN1HnJtTel6WA24GttR?p=preview
{{num | currency:'USD':true:'1.2-2'}}
Explanation :
number_expression | number[:digitInfo]
Finally we get a decimal number as text. Find the description.
number_expression: An angular expression that will give output a number.
number : A pipe keyword that is used with pipe operator.
digitInfo : It defines number format.
Now we will understand how to use digitInfo. The syntax for digitInfo is as follows.
{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}
Find the description.
minIntegerDigits : Minimum number of integer digits. Default is 1. (in our case 1)
minFractionDigits : Minimum number of fraction digits. Default is 0. (in our case 2)
maxFractionDigits : Maximum number of fraction digits. Default is 3. (in our case 2)