What does it mean for two ratios to form a proportion? O Both ratios are equal.
O Both ratios are unit rates.
O Both ratios involve time.
O The ratios are inverses.
PLEASE HELP

it means the ratios are inverse...

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%

answer is c

step-by-step explanation:

81/12=324/x

x=48