The answer is 4151/1000 as a improper fraction or 4.151 as a decimal
Explanation: if you popcorn, or multiply 4 by 1000 and add 151 making the numerator be 4151 while the denominator stays the same (it stays 1000)
From there if your answer needs to be a decimal you just divide 4151 by 100 to get 4.151
Hope this helps :)