Tugas.

1 2/5 jam = 7/5 jam = 7/5 × 60 = 84 menit

120 detik = 120 ÷ 60 = 2 menit

maka

84 + 2

= 86 menit

1 2/5 jam 120 detik
= 7/5 jam + 120 detik
= 84 menit + 2 menit
= 86 menit