SOLUTION: A driver decreases his petrol consumption in the first day of any month in the ratio 2 : 3 litres of petrol per day. He normally uses 4.5 litres of petrol per day. What is his cons

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Question 1099519: A driver decreases his petrol consumption in the first day of any month in the ratio 2 : 3 litres of petrol per day. He normally uses 4.5 litres of petrol per day. What is his consumption on the first day of any month

Answer by Theo(13342) About Me  (Show Source):
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he's using 2 liters instead of 3 liters on the first day of any month.
that means he's using 2/3 as much.
2/3 * 4.5 = 3
instead of using 4.5 liters, he's using 3 liters.
the ratio is 3 to 4.5
this can be shown as a fraction of 3 / 4.5 which can be simplified to 2 / 3 when you divide both numerator and denominator by 1.5.
numerator of 3 / 1.5 = 2
denominator of 4.5 / 1.5 = 3
ratio of 2:3 is the same as ratio of 3:4.5.