Question

Which ratios form a proportion? Use equivalent ratios to test each pair. (1 point)

four-ninths, two-thirds
six-fifteenths, nine-twelfths
twelve-sixteenths, fifteen-twentieths
eighteen-twentieths, twenty-four over thirty

2.
Which ratio forms a proportion with twenty over thirty? Use equivalent ratios to test each ratio. (1 point)

sixteen over twenty-four
ten-twentieths
seventeen over fifty-one
fifteen over sixty

3.
Which ratios form a proportion? Use cross products to test each pair. (1 point)

fifteen over forty, thirty-five over