To find out what 10 of 40 means, we need to interpret it as a percentage. Specifically, we want to calculate 10% of 40.
To calculate 10% of a number, you can simply multiply the number by 0.10. So, in this case:
10% of 40 = 40 × 0.10 = 4
This means that 10 of 40 is equal to 4. In other words, if you were to take 10 out of every 100 parts, 4 would be taken from 40 parts.