2/3 plus 1/6? Easy! Its 5/6! 7/16 minus 1/4? Simple, its 3/16. 3/21 times by 5/8? Errr... 15/168? Wait she can reduce it by a factor 3 so it would it be 5/59! She had to admit, working with fractions was a little more challenging than she would like to let on. Still, she feels that she...