What is 15 over 28 simplified?

Is 2.5 a natural number? What is the analytical interpretation of line integral? How do you write 79 thousandths as a decimal? What is a number 0 to1 that describes how likely an event is to occur? What three numbers when multiplied equal 518? What is the prime factorization of 74 and 444? What is mathematical operation? What shape is made out of triangles? Why the manhole cover is circle shape? What is 11 mulitplied by 11? What is a polygon with NO EQUAL sides? What is eight less than the quotientof x and 3 written in variable expression? What x 4 equals 25? 1.5g is equivqlent to how many mg? Which is greater 21.967 or 2.1968? What is 783 plus 348 plus 106 equals? What is the purpose of a fact box? How many different 3 digit house numbers could be made using numerals 4 7 8? How do you break the word smallest into syllables? How do you do a split in less than one week?