100%
-8/9 ÷ 8 = -1/9
7
-1
17
9
9/72 is equal to 1/8, and that is the simplest form.1/8
(9+8-7) * (6+5-4+3)*(2-1)1+9+2+8+3+7+4+6+5+5+6+4+7+3+8+2+9+1=100
9 - 8 =1 4 -1 =3 3*8= 24
81 : 8 + 1 = 9, and 9 x 9 = 81.Here's how to figure: If the 2-digit number is ab,. then the number is equal to 10*a + b. And nine time the sum equals 9*(a + b). Set these two equal and you have:9*a + 9*b = 10*a + b --> 8*b = a.Knowing that the digits must be in the range 1 through 9: 1 x 8 = 8, and 2 x 8 = 16, so the only possibility is a=8 and b=1.
9
24