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Module 1. Mathematics

If you bought a second hand car worth 4500 british pounds after getting 15% discount. How much did the car cost originally?
• 3800 british pounds
• 5300 british pounds
• 6000 british pounds

pB1B2 asking:
• explain pls

Community comments: 3

dimky
Posts: 511
02.12.2016 / 19:29

Hi!

x - (x * 15 / 100) = 4500
x - 0.15x = 4500
0.85x = 4500
x = 4500 / 0.85
x = 5294 (5300 as answer)

This question requires you to know how to make and solve equations.

JD2016
Posts: 54
04.12.2016 / 21:11

Or alternatively,another equivalent way which doesn't involve algebra is to say:
If you got 15% discount, then what you actually paid was 85%. So 4500 is 85% or 85/100 (eighty five hundredths). The price before discount is 100/100. So divide 4500 by 85 and multiply it by 100 to get the price before discount. You could also say that 15% is 3/20 (three twentieths) so that 4500 is 17/20 - so divide by 17 and multiply by 20 - but its the same thing.

BWeekes
Posts: 2
27.02.2025 / 12:26

This person has posted several almost identical questions and all are wrong in the exact same way.

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