USD /JYP= 130.30/90 means that if you sell USD 1 yuan to the bank, you will get JYP of 130.30 yuan, while if you buy USD from the bank with JYP, you need JYP of 130.90 yuan, and

So we can calculate JYP/CNY.

1. We hold JYP and trade it for CNY. First, we sell JYP for dollars, JYP 130.90 yuan for 1 yuan, and 8.265 1 yuan for CNY, so the price of JYP for CNY is 8.265 1.

Similarly, if you own CNY, you can change it into JYP. On the contrary, the buying price and selling price are exchanged. The price is 8.2699/ 130.30=0.063468.

3.JYP/CNY = 0.063 14 1/0.0468。

Written in the form of exchange rate, with five significant figures of 0.063 14 1/68.

The rest is easy to forget.