To round 27.5 to the nearest whole number, we look at the decimal part which is 0.5. Since 0.5 is equal to or greater than 0.5, we round up the whole number to the next highest number. Therefore, 27.5 rounded to the nearest whole number is 28.
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137 and a half can be written as an improper fraction by multiplying the whole number (137) by the denominator of the fraction (2) and adding the numerator (1) to get 275. Therefore, 137 and a half as a fraction is 275/2.
Anything from 126 to 149 is between 125 and 150. The number exactly in between 125 and 150 is 137.5.