Please help! these are 3 of my maths questions which i don't understand?
Don't read this if you don't want to (begin to) understand.First Question. What IS the question? It is "What is the % reduction?" So you have to be sure you are answering the right question. 79.5 is 53.02% of 149.95. But the reduction is NOT $79.50, it is how much was cut from the price or 149.95 - 79.50 = 70.45. 70.45 is 46.98% of 149.95. So the price was reduced by 46.98%B.) Where I live, we don't have a GST (Genreal sales tax) but even if we did it probably would't be the same as yours.First what is the question? The question is: "What is the cost of the dress (to the shop owner)". Second, what do we know? well we know that the cost of the dress, plus 65% of that cost and the GST on all of THAT is $149.95. Put it in an equation. Lets call the cost "C".$149.95 = C + (0.65 x C) + (GST x C )+ (GST x 0.65 x C)since 65% = 0.65.I can combine terms149.95 = 1.65 x C + 1.65 x C x GSTThats as far as I can go since I don't know your GST. If it was, like 10%, then I could plug that into the equation like this:149.95 = 1.65C + 1.65Cx0.1 = 1.1 x 1.65 x Cso 149.95 /(1.1 x 1.65) = C = cost = $82.62 and so he lost $3.12 but that assumes a GST of 10%.
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