The cost of a plane ticket increases by 12%. After the increase, the ticket costs $616. What was the cost before the increase? E
1 answer:
The cost before increase was $550.
Step-by-step explanation:
Given,
Increased price of plane ticket = $616
Increase percent = 12%
Let,
x be the original price of ticket.
Now,
The original price is 100% and 12% is increased, therefore;
New price = (100+12)% = 112%
Thus;
$616 is 112% of x.
112% of x = 616
Dividing both sides by 1.12
The cost before increase was $550.
Keywords: division, percentage
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If it needs to be solved mathematically and accurately, the math is a little more advanced, using the bisection method, or Newton's method.
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