tlg y kak bsk d kumpulin

11. 2,5 - 1 ¼ = 25/10 - 5/4 = 50/20 - 25/20 = 25/20 = 5/4
Maka, yg sisa = 5/4 ÷ 2,5 = 5/4 × 10/25 = 1/2
→ 1/2 × 100% = 50%
12. 10/3 × 12 = 40 tahun

Jadikan jwbn tercerdas yh:)