How can you use a double number line diagram to find what percent 80 is of 200?

Each mark on the top number line increases by _______, so the_____↓
( Third, First, Fourth, or second?) mark is 80. Each mark on the bottom line increases by ______% So, _____% of 200 is 80
[tex](type \: whole \: numbers\:) [/tex]
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