If your currently scanning speed is 947 items a hour and your target is 1,000 how many items do you need to scan a hour

after a hour we need 53 to scan

Explanation:

given data

currently scanning = 947 a hour

target = 1,000

to find out

how many items do you need to scan a hour

solution

we currently scanning 947 a hours

and our target is 1000

so remaining item left is

remaining item = target - currently scanning

remaining item = 1000 - 947

remaining item = 53

so after a hour we need 53 to scan