A person earns 125 dollar per day and spends 31 dollar everyday. How much would he spend, save and earn in thirty days?

3 answers

just multiply those numbers by 30, right?
Earn = $125 * 30

Spend = $31 * 30

Save = ($125-$31) * 30
$125 per day for 30 days would earn you 125*30=$3750
$31 per day for 30 days would lose you 31*30=$930

So the difference would be $3750-$930=$2820

That means the person will spend $930, and he'll save and earn $2820.