Find the product.

$150 \%$ of $\$ 84$

Rewrite $7 \frac{1}{4} \%$ as a decimal.

Multiply money amounts by decimals. Muliply: $\$ 62.58 \times 0.0021=\$ 0.13$

a $\$ 398.77 \times 0.000673$

b $\$ 220.81 \times 0.01975$

c $\$ 710.29 \times 0.2978$

d $\$ 1,297.55 \times 0.008271$

Interest on a promissory note collected in advance is ___.

Find the exact interest to the nearest cent. Then find the ordinary interest to the nearest cent.

$2,400 @ 9 % for 60 days