14/15-3/5 помогите 17/18-1/9 и

Question

14/15-3/5 помогите 17/18-1/9 и

Answer 1

14/15 - 3/5 = 14/15 - 9/15 = 14-9/15 = 5/15 =1/3

17/18 - 1/9 =17/18 - 2/18= 17-2/18 = 15/18 = 5/6

Answer 2

14/15-3/5 =14/15-3*3/5*3=14/15-9/15=5/15=1/3
17/18-1/9=17/18-1*2/9*2=17/18-2/18=15/18=5/6