Question

Help pls explain and how you got it

Answer 1

Explanation:

just minus 100 out of the percentage

for example 20% is 100 - 20 = 80

Answer 2

80% is 120 - 40 is half of 80 so multiply by 2 and you get 120
40% is 60 - given
20% is 30 - 20 is half of forty so half of 60 is 30
10% is 15 - half of 20 is 10 so half of 30 is 15
Not sure about the rest