The flag of OverlySandy Beach always has to be in a 7 : 8 scale. If you have enough fabric to make the item have 40 millimeters as its length, what does the width of the flag need to be in millimeters?
Let's assume that 7 corresponds to width and 8 with length.
Step 1: Set up proportions as such -
Length/width = 8/7 = 40/y
"y" is the unknown width
Step 2: Cross multiply
Hence width is 35 mm