Subject: Mathematics
Book: Maths Mastery
Percentages often appear in finance, shopping discounts, and data presentations. Converting them to decimals or fractions broadens the range of calculation methods available. To convert a percentage to a decimal, divide by 100 (e.g., 75% → 0.75). For a fraction, interpret 75% as 75/100, which simplifies to 3/4. A quick formula is Percentage ÷ 100 = Decimal, or Percentage/100 as a fraction, often simplifying if possible. This dual representation is key in more advanced math tasks, letting you multiply or add with ease, merging the best of both fractional and decimal computations.
A number is increased by 20% and then decreased by 10%. What is the net change?
View QuestionThe area of an equilateral triangle with side length 6 cm is:
View QuestionIf x^2 - 6x + 9 = 0, what is the value of x?
View QuestionWhat is the sum of all even numbers between 1 and 50?
View QuestionIf x + y = 10 and xy = 21, what is the value of x³ + y³?
View QuestionWhat is the LCM of 15 and 20?
View QuestionIf 8x = 512, what is the value of x?
View QuestionIf a person can type 45 words per minute, how many words can they type in 2 hours?
View QuestionIf a:b = 5:7 and b:c = 6:11, what is a:c?
View QuestionIf x² - 9x + 18 = 0, what are the roots of the equation?
View Question