What percent is 25 of 20 and round to the nearest 10th or 10th of a percent

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?