Take the sum of 6 and 7 and divide it by the sum of 10 and 3

1

Step-by-step explanation:

(6+7)/(10+3)=1

and hope can help you

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540