Answer:
The question can be misunderstood
10 + 20% = 10 + 20/100 = 10 + 0.2 = 10.2
But if the question is what is 10 increased by 20% it is
10 * (1 + 20%) = 10 * (1 + 0.2) = 10 * 1.2 = 12
So that is different.
Else with the other question
10 - 20% = 10 - 20/100 = 10 - 0.2 = 9.8
10 * (1 - 20%) = 10 * (1 - 0.2) = 10 * 0.8 = 8
Answer:
10 - 20% = 10 - 20/100 = 10 - 0.2 = 9.8
10 * (1 - 20%) = 10 * (1 - 0.2) = 10 * 0.8 = 8
Step-by-step explanation:
