Question

explain it how the 189 came in last second line. ​

Answer 1

Hey mate ,

At that line he took LCM of 5 and 15 which is 15

Thus at that step 15 was divided by denominator resulting quotient as 3 and then multiplying it with numerator i.e. 63 resulting to 189

Hope you find it helpful!!!

Do mark it as brainliest!!!!