Oh, isn't that a happy little question! When we have a mixed number like 138, it means we have a whole number (138) and a fraction part. To convert it to an improper fraction, we multiply the whole number (138) by the denominator of the fraction (1) and add the numerator (38). So, 138 as an improper fraction is 138/1.
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Well, isn't that a happy little number we have here! Let's turn 138.6 into a mixed number. We can write it as 138 3/5, where 3/5 represents the decimal .6. Just a little bit of math and we've created a beautiful mixed number!
137+1
Any proper fraction is less than 138%. There are an infinite number of them. (There are also an infinite number of improper fractions that are less than 138%, but that's another story.)
138/10 in improper fraction. 13 8/10 in mixed fraction
Per cent or percentage of a number is equivalent to the same number of hundredths of that number. 10% of 1380 = 1380 x 10/100 = 138.