$15/100 \times A = 20/100 \times B \Rightarrow 15A = 20B \Rightarrow A/B = 20/15 = 4/3$. Therefore, A:B = 4:3.
$15/100 \times A = 20/100 \times B \Rightarrow 15A = 20B \Rightarrow A/B = 20/15 = 4/3$। इसलिए, A:B = 4:3।