Mei is writing 4.28 as a mixed number. Find her mistake and correct it.

4.28 is a decimal and not a mixed number. To write it as a mixed number you keep the 4 and put 28 over 100 then simplify.

4.28 = 4 28/100 (simplify)

4 28/100 = 4 14/50 = 4 7/25

4.28 as a mixed number would be 4 7/25