Subject: Mathematics
Book: Maths Mastery
Percentage changes are ubiquitous in daily life, from price hikes to interest rate drops. To calculate a percentage increase, use the formula: [(New Value – Original Value) ÷ Original Value] × 100%. For instance, if a product’s price rose from ₹200 to ₹240, the increase is (240 – 200) = 40, and dividing by 200 yields 0.20, or a 20% increase. Conversely, percentage decrease follows the same formula but indicates a reduction in value. For example, if a ₹300 item drops to ₹225, the change is (225 – 300) = –75, and –75 ÷ 300 = –0.25, or a 25% decrease. Understanding percentage changes enables you to track stock performances, budget effectively, and compare year-on-year business growth. Frequent practice in real scenarios like monthly bills or commodity prices refines this essential skill.
If the sum of the angles of a polygon is 1080°, how many sides does the polygon have?
View QuestionIf the perimeter of a square is 36 cm, what is the length of its diagonal?
View QuestionIf a+b = 10 and ab = 21, what is the value of a^3 + b^3?
View QuestionThe angles of a quadrilateral are in the ratio 3:4:5:6. What is the largest angle?
View QuestionWhat is the probability of drawing a king from a standard deck of 52 playing cards?
View QuestionIf x - y = 5 and x + y = 15, what is the value of x?
View QuestionWhat is the value of x if 3x + 7 = 16?
View QuestionA cube has a side length of 4 cm. What is its volume?
View QuestionIf x^3 - 3x^2 + 4 = 0, what is one root of the equation?
View QuestionIf a+b = 10 and ab = 21, what is the value of (a-b)^2?
View Question