1.) 2/4+2/5×8/102.) 3/4×7/103.) 3/5:3/9

1]
2/4 + 2/5 × 8/10
= 2/4 + 16/50
= 50/100 + 32/100
= 82/100
= 41/50

2]
3/4 × 7/10
= 21/40

3]
3/5 : 3/9
= 3/5 × 9/3
= 27/15
= 9/5
= 1 4/5

Semoga Membantu