Question

please please answer my and explain it in proportion method and don't give rabish answer plzzzzzz ​

Answer 1

Answer:

₹405 is the answer

Step-by-step explanation:

Cost of 100 envelopes= ₹450

Cost of 1 envelope= 450/100

= ₹4.5

Now, Cost of 90 envelopes= 4.5*90= ₹405

please marks as brainliest