Work out 20% of 40. - OCR - GCSE Maths - Question 4 - 2019 - Paper 1

To find 20% of 40, we can use the formula:

ext{Percentage} = rac{ ext{Part}}{ ext{Whole}} imes 100

In this case:

• We want to find the part, which is 20% of 40.
• Hence, we can express this as:

rac{ ext{Part}}{40} imes 100 = 20 \

To isolate the part, we rearrange the formula:

ext{Part} = rac{20}{100} imes 40

Now we can calculate:

$$ext{Part} = 0.2 imes 40 = 8$$

Thus, 20% of 40 is 8.