Determine profitability based on hashrate of different algorithms

Determine profitability based on hashrate of different algorithms

I'm looking to do some work with whattomine.com's JSON feed they provide. The question I have is about the basic mathematical fundamentals between profitability and hashrate.

Using the following snippets below and ignoring any electricity costs I'd like to know how whattomine.com comes to the following 24hr profit conclusion:

For the Ethash algorithm I create 150 MH/s and this generates $10.66 worth of Ethereum.

For the Equihash algorithm I create 2150 H/s and this generates $10.32 worth of Zcash.

I'm assuming this uses the btc_revenue or btc_revenue24 index within the JSON so I will also provide that BTC is currently worth roughly $9,800.

I will gladly provide any other info needed to figure this out. Thanks for your time!

whattomine.com provides the following snippets from their JSON feed:

Ethereum":{  
    "id":151,
    "tag":"ETH",
    "algorithm":"Ethash",
    "block_time":"14.651",
    "block_reward":2.91,
    "block_reward24":2.91000000000001,
    "last_block":5151045,
    "difficulty":3.18818304923424e+15,
    "difficulty24":2.97908755875433e+15,
    "nethash":217608562503190,
    "exchange_rate":0.086051,
    "exchange_rate24":0.0848079230769232,
    "exchange_rate_vol":6058.82309384,
    "exchange_rate_curr":"BTC",
    "market_cap":"$81,487,950,717.86",
    "estimated_rewards":"0.00662",
    "estimated_rewards24":"0.00709",
    "btc_revenue":"0.00057003",
    "btc_revenue24":"0.00061004",
    "profitability":100,
    "profitability24":100,
    "lagging":false,
    "timestamp":1519521514
},

"Zcash":{  
    "id":166,
    "tag":"ZEC",
    "algorithm":"Equihash",
    "block_time":"149.0",
    "block_reward":10.0,
    "block_reward24":10.0,
    "last_block":278180,
    "difficulty":9166360.54559172,
    "difficulty24":8560913.83235059,
    "nethash":503965272,
    "exchange_rate":0.040171,
    "exchange_rate24":0.0399262639484978,
    "exchange_rate_vol":657.820701068,
    "exchange_rate_curr":"BTC",
    "market_cap":"$1,303,582,941.77",
    "estimated_rewards":"0.01001",
    "estimated_rewards24":"0.01072",
    "btc_revenue":"0.00040212",
    "btc_revenue24":"0.00043056",
    "profitability":71,
    "profitability24":71,
    "lagging":false,
    "timestamp":1519521312
},

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