Jennifer made a fruit juice using red and green grapes. Thirty percent of the grapes are green. If she used a total of 60 grapes, how many red grapes should she use?

1 Answer
Jul 31, 2016

42

Explanation:

If 30% if the 60 total grapes are green, then 100%-30%=70% of the grapes are red. To find the total number of red grapes, then, we must calculate 70% of 60. We do so by multiplying 60 by 70%=70/100.

"Total red grapes" = 60xx70/100

=(60xx70)/100

=4200/100

=42

Thus she used 42 red grapes.