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3 jam = 16 kerajinan
x jam = 80 kerajinan
dikali silang
80 x 30 = 16x
240 = 16 x
2400 / 16 = x
x = 15 jam
3 16
x 80
merupakan perbandingan senilai
3/x = 16/80
x = (80.3)/16
x = 15 jam
semoga membantu :)