Ideal answers for Exam Question

When there are several ways to complete a question, including quick methods, is it ok to choose any of them, or does it have to be a specific method?

Today I’m doing unknown and known percentage questions. There are very quick methods, such as cancelling and moving the decimal point but there are longer methods such as finding 10% then 5% then adding together. Would I drop marks by not doing a specific method?

Thanks.

6% of 40
Becomes 0.06 x 40 = 2.4

It was a short on YT 🤷🏻

Yes that’s how I read it.

Thanks.

6% of 40
Becomes 0.06 x 40 = 2.4

It was a short on YT 🤷🏻

Without wanting to stretch out a "one liner" too much, you could do
6*40 = 240,
then divide by 100 (shift dp two places) to get 2.4. Keep the multiplication as integers then a simple dp shift/division by 100

Or use the 6% of 40 is 40% of 6 trick to get
0.4*6 = 2.4

or ...