Percentages for Beginners

Advance to level 2 by learning how to work with percentages, calculate percentage change, apply shortcuts to handle increases or decreases, and express one value as a percentage of another.

Learn how to decrease a number by a percent using mental shortcuts and cross-multiplied methods, such as 20 percent off 70, yielding 56, and 50 percent of 30 equals 15.

Learn to apply a 30 percent discount by calculating sale price and savings from an original price, using 800 dollars to get 560 dollars sale price and 240 dollars saved.

Apply percentages to discounts by calculating the price after discount 1400 and the price before discount 1750 from a 20 percent sale saving 350 rupees.

Explore how to compute discount-based prices using percentage reductions and successive discounts, with examples on an air conditioner and textbooks calculating mark price, sale price, and bulk costs.

Determine tax payable using tax brackets for a chargeable income of 42,000. Apply zero tax on the first 20k, 2% on the next 10k, and 7% on the remainder.

Calculate Mr. Lee's taxable income by subtracting total reliefs from 84,000, then apply the tax brackets to determine the tax payable and the take-home pay of about 82,801.80.

Learn how to apply percentage to profit and loss, using cost price and selling price with a newspaper example, and calculate profit or loss as a percentage.

Practice-based lesson on profit and loss: calculate cost versus selling price, express loss as a percentage of selling price, include tax effects, and determine required selling prices to preserve profits.

Understand simple interest by applying the principal amount to a rate of interest per annum, illustrated with an 8 percent example over three years to show earned interest and total.

Explore compound interest by applying the rate to the growing balance, contrast it with simple interest, and illustrate the formula with a 10 percent, 2000 principal example.

Practice compound interest calculations using principal, rate, and time, including yearly and monthly compounding, to find total amounts and interest.

Explain how commission adds to a fixed salary by paying a percentage of sales, illustrated with a $40,000 base and 2 percent on $250,000.