`(9)/(10)-:(7)/(8)` of `(11)/(12)` of `(7)/(9)times(5)/(6)`

Which of the following are in descending order of their values? (5)/(9),(7)/(11),(8)/(15),(11)/(17) (b) (5)/(9),(8)/(15),(11)/(17),(7)/(11) (c) (11)/(17),(7)/(11),(5)/(15),(5)/(9)(d)(11)/(17),(7)/(11),(5)/(9),(8)/(15)

(9)/(7)times(3)/(5)+(8)/(7)-(9)/(7)times(10)/(9)

The expression (5(5)/(8))/(6(3)/(7)) of (6(7)/(11))/(9(1)/(8))-:(8)/(9)(2(3)/(11)+(13)/(22)) of (3)/(5) equals (a) 1 (b) (1)/(2)( c) (7)/(9)( d) (5)/(12)

Verify each of the following: (i) (3)/(7)xx(-5)/(7) = (-5)/(9)xx(3)/(7) (ii) (8)/(7) xx (13)/(9) = (13)/(9) xx (-8)/(7) (iii) (-12)/(5)xx (7)/(-36) = (7)/(-36) xx (-12)/(5) (iv) -8 xx (-13)/(12) = (-13)/(12)xx(-8)

(5)/(6) -: (6)/(7) xx ? - (8)/(9) -: 1 (2)/(5) -: (3)/(4) xx 3 (1)/(3) = 2(7)/(9)

(5)/(6)-:(6)/(7)xx?-(8)/(9)-:1(3)/(5)+(3)/(4)xx3(1)/(3)=2(7)/(9)(7)/(6)(b)(6)/(7)(c)1(d) None of these

((7)/(9))^(-11)times((9)/(14))^(-9)

The value of: [(5/7 " of " 1 (3)/(8) " of " 6/7)] div [1-(1)/(7) xx ( 5/12 +(1)/(3)) ] xx ((1)/(7) -(1)/(9))/((1)/(7) +(1)/(9))