Everyday Math Pack

The highest-traffic everyday calculators: percentages, sale prices, restaurant tips, and investment ROI.

Find X% of Y, what percent X is of Y, and percentage change

Sale price, savings, and original price from a discount

Calculate tip and split the bill at a restaurant

Return on investment as a percentage and multiple

Add or extract sales tax from a price

Trip fuel cost from distance, MPG/L/100km, and price