tolong dijawab dong please

1) 0,6 = 6/10
= 3/5

2) 20% = 20/100
= 1/5

3) 2/5 +3/6 = 12/30 + 15/30
= 27/30
= 9/10

4) 6 - 2/7 = 6/1 - 2/7
= 42/7 - 2/7
= 40/7 = 5 5/7

5) 3/7 x 2/3 = 2/7