Answer:
30%
Step-by-step explanation:
To calculate the percentage of deliveries that Lamar has completed so far, divide the number of deliveries so far by the total number he needs to make.
21/70 = 0.3
Convert the decimal to percentage form by moving the decimal two places to the right and including the percent sign.
0.3 = 30%
He has completed 30% of his deliveries.