77. An article is said to have been sold at the price of 830.4 dollars. Then it already earned a profit of 12% on the cost price.
Solutions:
=> 830.4 dollars is the total costs of article including the 12% profit
=> 12% is the profit of the said article.
=> 12% = 12% / 100% = 0.12
=> 830.4 * .12 = 99.648 = the value of profit
Now, let’s subtract this to find the original cost
=> 830.4 – 99.648 = 730.752 = the original price of the article.
