I think we need a review of fractions. Fun Fact: The bottom number in any fraction (1/2, 1/100, 1/350, etc.) is called the denominator. Say it with me: dee-nomm-inn-ater.
1. To convert from one scale to another, the rule is: Denominator of the scale you have divided by denominator of the scale you want. So if you have a plan in 1/350 and want to convert it to 1/400, simply divide 350 by 400: 350/400 = 0.875.
2. Now, convert that to a percentage, because just about every copier uses percentage to enlarge or reduce. How do we convert to percentage? Multiply the result obtained in Step 1 by 100: 0.875 x 100 = 87.5%. If the copier you are using does not allow fractions of a per cent, then round up or down at your discretion.
Study this. Learn this. There will be a quiz tomorrow. Bring a #2 pencil and your Big Chief tablet to class.