3/18÷7/21 do Anybody know this

Verified Answer :

The answer is 1/2 and in decimal form 0.5.

3/18÷7/21=3/1821/7=321/18*7=63/126
No both numbers we can divide them by 7
63
÷7/126÷7=9/18
Then also we can divide both numbers by 9
9
÷9/18÷9=1/2
And the answer is 1/2