Final answer:
Bob earned $30 mowing lawns today by making 60% of what he earned yesterday, which was $50.
Step-by-step explanation:
The question asks how much money Bob earned mowing lawns today if he earned $50 yesterday and today he made 60% of yesterday's earnings. To calculate this, we need to find 60% of $50:
- First, convert the percentage to a decimal by dividing by 100, which gives us 0.60.
- Then, multiply this decimal by the amount earned yesterday, which is $50.
- So, 0.60 multiplied by $50 equals $30.
Therefore, Bob earned $30 mowing lawns today.