When you are identifying the coordinate of a fraction or a mixed number on a number line, how do you determine the denominator

How many grams must be adde to 970g to make 1 and a half kg

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax