Answer:
15g
Explanation:
Method A: Calculate the percent first
If you decrease an amount by 25%, you end up with 75% of the amount.
75% of 20g = 0.75 × 20g = 15g
Method B: Calculate the decrease first
We start with 20g. To decrease 20g by 25%, we calculate 25% of 20g.
25% of 20g = 0.25 × 20g = 5g
The decrease amount is 5g.
Now we subtract 5g from 20g.
20g - 5g = 15g