Math crossword puzzle

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Across
  1. 3. the amount of increase in a value, expressed as a percentage of the original value.
  2. 10. the reduction of a quantity expressed as a percentage of the original value.
  3. 12. one where the ratio between two variables is not constant, meaning the relationship is not directly proportional.
  4. 13. quantifies the relative difference between two values, expressed as a percentage, indicating either an increase or decrease
  5. 15. a sum of money given voluntarily beyond the obligation for a service, typically calculated as a percentage of the bill.
  6. 16. a simple calculation based on the percentage of a retail price of a good or service.
  7. 19. the point where the x-axis and y-axis intersect in a two-dimensional coordinate system, represented by the coordinates (0, 0).
  8. 20. The selling price is the amount a customer pays for a product or service.
  9. 21. the cost of borrowing money (for borrowers) or the return earned on savings and investments (for lenders), typically expressed as a percentage of the principal amount.
  10. 22. the amount added to the cost of a product to determine its selling price, often expressed as a percentage of the cost.
Down
  1. 1. a percentage of a total sales amount paid to an employee or agent for selling products or services.
  2. 2. A fee is a payment made for a service, transaction, or privilege, distinct from wages or salaries.
  3. 4. the difference between a measured or calculated value and the accepted or true value, often expressed as an absolute or relative error, or as a percentage.
  4. 5. the price a retailer pays to a wholesaler for goods, typically a lower price per unit for buying in bulk, and it's calculated by adding the total cost of goods (including materials, labor, and overhead) to the desired profit margin.
  5. 6. the constant value of the ratio between two proportional quantities
  6. 7. a ratio that compares two quantities with different units, where the second quantity is one unit.
  7. 8. exists between two variables where their ratio is constant, meaning as one variable changes, the other changes at the same rate.
  8. 9. a number or ratio that can be expressed as a fraction of 100.
  9. 11. a way of comparing two or more quantites.
  10. 14. a technique used to calculate the proportion of interest paid on a sum over a set time period at a set rate.
  11. 17. an additional amount of money given, usually as a percentage of the total bill, to thank someone for their service.
  12. 18. the initial amount of money borrowed or invested, on which interest is calculated.