Find $\frac{3}{100}$3100 of $1600$1600.

Find $\frac{161}{100}$161100 of $9100$9100.

What is $\frac{7}{10}$710 of $$270$270?

Calculate $\frac{40}{100}$40100 of $7$7 kilograms.

Simplify numerical expressions involving integers and rational numbers, with and without the use of technology