How do you evaluate #-\frac{18\times z}{207\times z}#?
1 Answer
Explanation:
By evaluating or I assume simplifying the fraction, we can first cancel out the
Remember you can only do this since the
Now we simplify
We know 18 is divisible by 9 but what about 207? The divisibility rule for 9 is that if the sum of the digits is divisible by 9, then the number is divisible by 9.
The digits in 207 are 2, 0, and 7.
This means 207 is divisible by 9. So:
Simplified, the fraction is
I hope this helps you out!