How do you get the difference of a number?

What is the word that means done very carefully? What percent of a year is a week? How much is 40 percent of 40? If you bid a project that will cost you 4000 and you want to make 30 percent you should add 1200 It is an easy mistake though to see how you did in the end if you divide 1200 by 5200 thats only 23 per? Estimation can check that an answer is what? How many weeks is 78 days? What is the mixed number for 14 over 16? What is aQuarter minus one third? How many hours do i have from now till Tuesday at 10 am? What is the name of shape has 25 sides? What does acending sort mean? Convert 12.355 feet to meters? What is total angles of nine sided polygon? How you can pick out the pile of counterfeit coins in one step procedure using an equal arm balance? What is opposite of multiplying by 3? What is the answer for math with pizzazz page d-60? What is -8x minus 4x? Round 857836 to the nearest hundred? What property does the following example illustrate 2 plus 8 plus 7 equals 2 plus 8 plus 7? What is 3C and 5S?