Hi there,

Yes and no.

**First, General Advice:** Generally, if you can eyeball something and point out that insight, do so prior to doing math! However, then suggest calculating the exact number "If that would be helpful/useful". As in, propose calculating the math and don't make the independent decision to skip it...let them guide you here as to whether it will prove to be useful later or not.

**Second, Advice for this Scenario:** **Do that math! **4M/20M is 20%, 1.6M/16M is 10%. That is literally why we practice fast math! You should be able to eyeball this and say 20% and 10%...there's no need to drop everything and spend a minute doing it. In this specific scenario, eyeballing and doing the % calcualtion is one and the same...you're expected to be able to see these percents right off the bat.

Hi there,

Yes and no.

**First, General Advice:** Generally, if you can eyeball something and point out that insight, do so prior to doing math! However, then suggest calculating the exact number "If that would be helpful/useful". As in, propose calculating the math and don't make the independent decision to skip it...let them guide you here as to whether it will prove to be useful later or not.

**Second, Advice for this Scenario:** **Do that math! **4M/20M is 20%, 1.6M/16M is 10%. That is literally why we practice fast math! You should be able to eyeball this and say 20% and 10%...there's no need to drop everything and spend a minute doing it. In this specific scenario, eyeballing and doing the % calcualtion is one and the same...you're expected to be able to see these percents right off the bat.