40
Try dividing 400 by ten you'll get 40 (or just remove a zero or decimal point to the left when dividing by 10)
each friend would get 4 grapes, there will be some loftover at the end
Answer:
$5830.
Explanation:
730-510=220m
220/4=55 dresses made
55*106=$5830
So what are we trying to find the reduced fraction or inverse operation