Question

20/40 - 21/40 x 80/7 Reduce answer in lowest terms. HELP.

Answer 1

`(20)/(40) - (21)/(40) \cdot (80)/(7)= (1)/(2) - (3\cdot7)/(40)\cdot(2\cdot40)/(7)= (1)/(2) - (3)/(1)\cdot(2)/(1)= (1)/(2) -6=-5 (1)/(2)`

Answer 2

`(20)/(40)-(21)/(40)\cdot (80)/(7)=(\\ot20^1 )/(\\ot40^2) - (\\ot21^3)/(\\ot40^1) \cdot ( \\ot80^2)/(\\ot7^1) = (1)/(2)- 6=-5(1)/(2)`