tolong bantu yaa terima kasih banyak beserta caranya

1)2/5+25/100-3/10=
40/100+25/100-30/100=65/100-30/100
=35/100
2)215/100-4/5+15/100=215/100-40/100=
175/100+15/100=190/100
3)4/5×20/100=4/25

1.
=2/5+25%-0,3
=(2/5)+(25/100)-(3/10)
=(40/100)+(25/100)-(30/100)
=(35/100)
=7/20
=35%

2.
=2,15-4/5+15%
=(215/100)-(4/5)+(15/100)
=(215/100)-(80/100)+(15/100)
=135/100
=27/20
=135%

3.
=4/5*20%
=4/5*(20/100)
=(80/500)
=4/25

semoga membantu
jadikan jawaban terbaik.
saya capek mengetik