nilai dari 6⅜:1,7:225‰tolong jawab dong pliss?

6 3/8 : 1,7 : 225‰
= 51/8 : 17/10 : 225/1.000
= 51/8 x 10/17 x 1.000/225
= 51/8 x 10/17 x 40/9
= 20.400/1.224
= 16 816/1.224
= 16 102/153
= 16 34/51

6 ⅜=51/8
1,7= 17/10
225 %=225/1000=9/40
=(51/8:17/10):9/40
=(51/8×10/17):9/40
=15/4:9/40
=15/4×40/9
=50/3=16 ⅔