Im stuck, idk how to do ratios.

21:6, 7:2, 14:4

Step-by-step explanation:

This table represents the ratios. For 21 square meters of fabric, Harry can make 6 wizard cloaks. We're trying to find a) how many cloaks we can make out of 7 square meters, and b) how many square meters is needed for 4 cloaks.

A)

Simplify the ratio by finding the LCD (Lowest Common Denominator) of 21 and 7LCD=3  *LCDs are greater than 1*21/3 and 6/3The new ratio is 7:2You can make 2 cloaks out of 7 square meters of fabric

B)

For this one, it's a little different. You're essentially working backwards.The easiest way to find this one, is finding out how many square meters of fabric are needed for 1 cloak. divide 21 by 6 to find this21/6 = 3.5You will need 3.5 square meters of fabric for 1 cloakMultiply this by 4 to find the amount of fabric needed for 4 cloaks3.5*4 = 14, 1*4 = 4your new ratio is 14:4You can make 4 cloaks out of 14 square meters of fabric. *You could also just multiply the last ratio by 2. 7:2 would be 14:4*

formula field

Explanation

What is a formula field?

Formula field refers to a read only field , the value in this is determined by us.Any update we make in this field it will by itself update formula field value.

Formula field is familiar when you for example calculating currency