Equivalent Fractions - Missing Denominator (100 Worksheets)

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.