Question

Katie selling lemonade for $1.50 per cup she decides to put them on sale for $.90 what percent discount did she give on her lemonade

Answer 1

$1.50- $0.9
=$0.6

Percent discount=
$0.6/$1.5 x 100
=40%

Check answer=
40/100 x $1.5
=0.6

$1.5- $0.6 = $0.9

(I hope this solution help!)