We normally change to the smaller unit to avoid having to work with decimals. In a bunch of 32 grapes, 4 are mouldy. What percentage of the grapes is mouldy? Express as a fraction: \(\frac {4} ...

So, let’s start with a fraction. What about 1/10? How do we change a fraction into a percentage? A percentage is a fraction of 100, so let’s scale up that denominator to 100! Multiply the ...