# How can I take the exchange rate (1-Crypto-to-USD) and convert it to the other direction? (1-USD-to-Crypto)

My Question is below:

I get the value of one USD's amount in bitcoin using the `last` value from btc-e (In case someone finds this useful..)

The btc-e api call is https://btc-e.com/api/3/ticker/btc_usd

``````{"btc_usd":
{
"high":245.196,
"low":238.75,
"avg":241.973,
"vol":1311899.79685,
"vol_cur":5434.56688,
"last":242.291,
"sell":242.29,
"updated":1431260454
}}
``````

The sum is like this

``````( 1 / ( 242.291 / 100000000 ) ) / 100000000

= 0.004127268449921788       btc-e exchange price for \$1 worth of BTC

//0.00411811                 this is similar to blockchain.info's \$1 average price
``````

To explain, I am mimicking https://blockchain.info/tobtc?currency=USD&value=1 as it converts the price of one USD to its value in BTC like so:

``````0.00411811
``````

My question:

I need to somehow do this with http://dogecoinaverage.com/USD

Which states:

The global volume-weighted average price of one Dogecoin is:

``````0.00009289 USD
``````

Could I use that information to mathematically get the average price of 1USD in DOGE?

If x is the number of dogecoins per dollar, then `x * 0.00009289 = 1`. So
`x = 1 / 0.00009289 = 10765.421`.