Question

You had 90 books on your shelf. You decided to donate 20%. How many books were donated? How many do you have left?

1. 30 donated and 88 left
2. 24 donated and 72 left
3. 18 donated and 64 left
4. 18 donated and 72 left​

Answer 1

4. 18 donated and 72 left
20% of 90= 18
80% of 90=72
———————-
100% of 90=90

Answer 2

The answer is the forth option