Answer:
2.5 : 1
Step-by-step explanation:
(1) 150 : 60 ← divide both parts by 10
(2) 15 : 6 → ( not 100 : 60) ← divide both parts by 3
(3) 5 : 2 ← divide both parts by 2
(4) 2.5 : 1
no, it's 81
9×9=81 hope that this helps you and have a great day :)
