Răspuns :
( 4 / 5 - 8 / 15 : 4 / 3 ) × 25 / 18 =
( 4 / 5 - 8 / 15 × 3 / 4 ) × 25 / 18 =
( 4 / 5 - 24 / 60 ) × 25 / 18 =
( 48 / 60 - 24 / 60 ) × 25 / 18 =
24 / 60 × 25 / 18 =
600 / 1080 = 5 / 9
( 4 / 5 - 8 / 15 × 3 / 4 ) × 25 / 18 =
( 4 / 5 - 24 / 60 ) × 25 / 18 =
( 48 / 60 - 24 / 60 ) × 25 / 18 =
24 / 60 × 25 / 18 =
600 / 1080 = 5 / 9