Question

3 7/20+4,5×(4/20-120 persen) tolong ubah ke pecahan biasa ya

Answer 1

3 7/20 = 3,35 = 67/20
4/20 = 0,2 = 1/5
120% = 1 1/2 = 3/2
4,5 = 4 1/2 = 9/2
jadi
3,35+4,5x(0,2-1,2)
3,35+(-4,5)
3,35-4,5
-1,15

Answer 2

3 7/20 + 4,5 × (4/20 - 120%)

67/20 + 45/10 × (4/20 - 120/100)

67/20 + 45/10 × (4×100/20×100 - 120×20/100×20)

67/20 + 45/10 × (400/2.000 - 2.400/2.000)

67/20 + 45/10 × -2.000/2.000

67/20 + 45×(-2.000)/10×2.000

67/20 + (-90.000/20.000)

67×20.000/20×20.000 + (-90.000×20/20.000×20

1.340.000/400.000 + (-1.800.000/400.000)

-460.000÷10.000/400.000÷10.000

-46÷2/40÷2

-23/20