Can someone answer these questions please I been stuck on this all day

Carpet required: 35 square yards. Cost: $700.

Wallpaper required 185 square feet, 4.2 double rolls needed, but you must buy full rolls. So 5 rolls will cost $125.

Step-by-step explanation:

Multiply the dimensions of the floor to get total square footage. Divide by 9 to convert to square yards.

314.5 ÷ 9 = 34.944. Round to 35 square yards. Multiply by $20 to get the cost of the carpet.

Multiply the dimensions of the wall to get total square footage.

Divide by 44 to get the number of rolls needed. Partial rolls not allowed. So it's 5 rolls times the $25 per "double roll." $125 is the cost.

the answer is 15% decrease