Quantitive Literacy-> I need help with this math problem.

Question

In 2007, the U.S. government spent $31.8 billion on foreign aid. The entire budget was $2.77 trillion. Estimate the percentage of the budget spent on foreign aid by rounding the foreign aid budget to $30 billion and the entire budget to $3 trillion. Calculate the percentage without using estimation and compare the two results. Round your second answer in percentage form to two decimal places. It's asking for both the exact and estimated percentage.

Answer 1

30,000,000,000 / 3,000,000,000,000 = 3 / 300 = 1 /100 = 1% estimation

 

31,800,000,000 / 2,770,000,000,000 = 318 /27700 = 1.15% without using estimation

 

Without using estimation, the results are .15% higher.