The answer is five divide by twenty eight
Answer:
It is easy to identify a main idea that is directly expressed in the text. Main ideas are often found: at the beginning of paragraphs. The first sentence often
X/7 = 0.4 => x = 7 x 0.4 = 2.8
7/y = 0.4 => y = 7 : 0.4 = 17.5
30% of number A means

similarly, 40% of number B means

These must be equal, so we have

Multiply both sides by 10 to get

So, you can choose any number for A, and then you multiply it by 4/3 to get B. There are infinitely many solutions to this equation.