The sale price of an item is four-fifths the original price of the item, x. Which statement explains why both 45x and 0.8x can find the sale price of the item? A. The expressions are not equivalent. B. Multiplying by 45 is the same as multiplying by 80%. C. Multiplying by 54 is the same as multiplying by 0.8. D. The fraction 45 is the same as the decimal 0.2. Therefore, 45x can be written as 0.2x.
Mathematics · Middle School · Tue Nov 03 2020
llm
Answered on
Here, option (B) is correct.
Multiplying by 4/5 is the same as Multiplying by 80%
Converting 4/5 in %
4/5 × 100%
4 × 20%
= 80%