If we take 54 to be the reduced price, and "x" to be the original price, now "x" is the 100%, and 54 is the 100% - 10%, or 90%.
Answer:
4/25
Step-by-step explanation:
........................................
I) 4 Gallons
II) $77
Step-by-step explanation:
30km 1 gallon
420km ?
420 ÷ 30 = 14
? = 40
So, 4 gallons more will be needed to complete the journey.
1 gallon $5.50
14 gallon $?
14 x $5.50 = $77
The cost of the petrol is $77