Maths - Percentages Class 7 Online Quiz

If Amber got 9 out of 10 correct, she got 1 out of 10 wrong. 1/10 is equal to 10/100, which is 10%.

To convert 42/50 to a percentage, multiply both the numerator and denominator by 2 to get 84/100, which is 84%.

A percentage is a fraction out of 100. Since Rohan got 23 out of 100, this is equivalent to 23%.

One quarter is 1/4. Dividing 1 by 4 gives 0.25, and multiplying by 100 to convert to a percentage gives 25%.

10% of 200 is 20. Decreasing 200 by 20 results in 200 - 20 = 180km.

One half is 1/2. Dividing 1 by 2 gives 0.5, which is equal to 50%.

To convert a decimal to a percentage, multiply by 100. 0.4 * 100 = 40%.

To convert a percentage to a decimal, divide by 100. 37 / 100 = 0.37.

To convert 20% to a decimal, divide 20 by 100, which equals 0.2.

20% of 30 is 0.2 * 30 = 6 students away. The number of students in class is 30 - 6 = 24.

20% of 200 is 0.2 * 200 = 40.

10% of 200 is 0.1 * 200 = 20.

10% of 300 is 30. Increasing 300 by 30 results in 330kg.

75% is 3/4. 3/4 of 200 is (200 / 4) * 3 = 50 * 3 = 150.

50% is half. Half of 300 is 150.