What is 25 over 90 simplified?

How do you know if a solution is always true or sometimes true? How many sig figs are in 43.74 km? What make a line parallel? What is the equation of the line that passes through the point (-3 1) and has a slope of 2 over 3? What are the prime factors factors of 245? What is .48 in percentage? What is the LCM of 75 and 180? Is a parallelogram a quadrilateral in which opposite sides are parallel? What do you call black white and gray colors? How do you find the sum of the measures of the angles of a quadrilateral? What is 339 x 336? What is 147006 by 2 significant number? What is the order of magnitude of 15? What is the antilog of 3? How many 20x20 ceramic tiles do you need for a 15'x20' room? What is the name of a shape with all equal sides? How do you solve these equations using the elimination method? What ia half of 36? How do you write 6 remainder 9 as a decimal? Who invented mathematical sets?