Tolong cra krja cari keliling nya

2. 75% - 0,15 = 75/100 - 5/100
= 60/100
= 60% atau 0,6
3. ½ + ⅓ - ¼ = (6+4+3)/12
= 13/12
= 1 1/12
4. Maaf de gambarnya kurang jelas
1 1 31 217 1
5. 2 1/3 x 1/4 x 31/2 = 217/24 = 9 1/24