Percentages | Math | Broomfield School
Q&A Practice Quiz
A percentage is a way to show what percent of something there is. For example, 10%
means that there are 10 parts out of $80.
1. Calculate 10% of $80.
Let 10% of $80 = X
10/100 * £80 = X
Answer: X = $8
2. What is 40% of 120?
40% of 120
= (40/100) × 120
Answer = 48
3. If 16% of 40% of a number is 8, then find the number.
Let X be the required number.
Therefore, as per the given question,
(16/100) × (40/100) × X = 8
So, X = (8 × 100 × 100) / (16 × 40)
Answer = 125
4. What percentage of 2/7 is 1/35 ?
Let X% of 2/7 is 1/35.
∴ [(2/7) / 100] × X = 1/35
⇒ X = (1/35) × (7/2) × 100 Answer = 10%
Q&A Practice Quiz
A percentage is a way to show what percent of something there is. For example, 10%
means that there are 10 parts out of $80.
1. Calculate 10% of $80.
Let 10% of $80 = X
10/100 * £80 = X
Answer: X = $8
2. What is 40% of 120?
40% of 120
= (40/100) × 120
Answer = 48
3. If 16% of 40% of a number is 8, then find the number.
Let X be the required number.
Therefore, as per the given question,
(16/100) × (40/100) × X = 8
So, X = (8 × 100 × 100) / (16 × 40)
Answer = 125
4. What percentage of 2/7 is 1/35 ?
Let X% of 2/7 is 1/35.
∴ [(2/7) / 100] × X = 1/35
⇒ X = (1/35) × (7/2) × 100 Answer = 10%
