What is 12.8 times 3 three fourths?

To calculate 12.8 times 3 and three fourths, we first need to convert the mixed number 3 and three fourths to an improper fraction, which is 15/4. Then we multiply 12.8 by 15/4. This can be done by multiplying the whole number part of 12.8 (12) by the numerator of 15 to get 180, then adding the product of the decimal part (0.8) multiplied by 15 to get 192. Finally, divide 192 by 4 to get the final result of 48.