Percentage and Equation Problems

This video tutorial covers various mathematical concepts involving percentages and equations. It begins with a practical example of road paving to explain percentages, followed by solving equations to find unknown values. The tutorial also includes analyzing exam questions using percentages, solving different percentage problems, and finding solutions to equations. Finally, it demonstrates dividing decimals by converting them into whole numbers.

If a crew has paved 3/4 of a mile and this represents 50% of the work, what is the total length of the road?

• 1 mile

• 2.5 miles

• 2 miles

• 1.5 miles

Which equation represents 40% of a number x being equal to 35?

• 4x = 35

• 0.4x = 35

• x/40 = 35

• 40x = 35

If Priya has completed 9 questions, which is 60% of the exam, how many questions are on the exam?

• 18

• 15

• 20

• 12

What is the value of 'a' if 20% of 'a' is 11?

• 44

• 55

• 60

• 50

If 75% of 'b' is 12, what is the value of 'b'?

• 12

• 16

• 18

• 20

What is the value of 'c' if 80% of 'c' is 20?

• 35

• 30

• 25

• 20

If 200% of 'd' is 18, what is the value of 'd'?

• 18

• 9

• 6

• 12

In the equation 2n - 3 = 7, what is the value of n?

• 2

• 4

• 5

• 3

Which number is a solution to the equation 8 = 2/5 * x?

• 5/16

• 8/5

• 20

• 16/5

What is the result of dividing 0.009 by 0.002?

• 3.5

• 4

• 5

• 4.5