Rounded to the nearest whole number, 12.75 is 13.
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15% of 1275= 15% * 1275= 0.15 * 1275= 191.25
The 50th triangular number is (50)(51)/2=1275
he other number is 1275
26775
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So the required decimal representation is 1275, exactly as in the question.