Answer:
31/458 or 458/31 you worded it confusingly
Step-by-step explanation:
15 inches of ribbon<span> for </span><span>each</span>
Step 1 is correct because it is easy method to do math equations
If 1/6 of the pan was left and there were 2 pieces left you just need to set 1/6 equal to 2/some number, this allows you to say that 1/6=2/x --> x/6=2-->x=12.
My explanation might be a little poor since this becomes fairly fundamental later on but hopefully it helps.
20 is the answer.
15% of 50= 7.5
45% of 50= 22.5
22.5+7.5=30
50-30=20.
