Answer:
7 : 30
Step-by-step explanation:
this can be simplified by looking for a number that is common
we can first divide by 10 as this is common
1260/10 = 126
5400/10 = 540
we now have 126 : 540
we can divide by 2 as it is also common
126/2 = 63
540/ 2 = 270
we can also divide by 9 as its also common
63/9 = 7
270/9 = 30
the simplified answer is :