Question

he number of animals living in a zoo increased by 11% last year. At the beginning of last year, there were 900 total animals. How many animals lived in the zoo at the end of last year?

Answer 1

$900+11\% \times 900=900+ \frac{11}{100} \times 900=900+11 \times 9 =900+99=999$

999 animals lived in the zoo at the end of last year.