Equivalent Fractions: Missing Denominator

One hundred printable worksheets on finding the missing denominator that makes two fractions equivalent. The set holds 1,200 different problems across four levels of difficulty, twelve to a page, with the answer key for each worksheet printed on the page straight after it. Denominators stay inside the ones a fourth grader actually works in - halves through twelfths, then fifteenths, sixteenths, twentieths and twenty-fifths.