What is 21 out of 28 reduced to?

What percentage is 5 of 42? 20 percent discount off of 40 dollars? What is the answer to 4.2354 round to the nearest tenth? How do you write and 1150.00 in words? Do X-rays have high energy and short wavelength? What is the circumference of a circle with a radius of 72 ft? What is 4000000 million in word form? What are the applications of square and square roots in daily life? What is the rule for multiply numbers with the same base but different exponents? What follows this sequence 12 13 15 17 18? Why was the code invented? How many right angles are formed when three perpendicular lines intersect? What educational experience is needed to become a music producer? What is 800 D? Two factors of sixty with a sum of seventeen? What is n - 1 - n - 1 - n - 1 if n is 2? What is 19 times 189? What in math is 34x-12? How many sq feet is in a 3rd of an acre? How much money is 1000 nickles?