Fractions 1. Adding 1. Find a common denominator 1. Subtracting 1. Find a common denominator 2. Borrow from a whole number if needed (1 = 6/6) 1. Multiplying 1. Change mixed numbers to improper fractions 2. Multiply top numbers and bottom numbers straight across 3. Reduce the fraction that results as your answer 1. Dividing 1. Invert the second fraction and then multiply (see above) Decimals 1. Adding 1. Line up decimal points 2. Add columns 1. Subtracting 1. Line up decimal points 2. Subtract columns 1. Multiplying 1. Multiply the numbers, ignoring the decimal points 2. Count all numbers to the right of the decimal points 3. Start at the far right and count that number of spaces to the left 4. Place decimal there 1. Dividing 1. Eliminate the decimal in the divisor by moving to the right the appropriate number of spaces 2. Move the decimal in the dividend the same number of spaces 3. Write the decimal directly above where it appears in the dividend Converting Decimals/Fractions/Percents 1. Decimal to percent 1. Move the decimal two places to the right and add a percent sign 1. Percent to decimal 1. Move the decimal two places to the left and remove the percent sign 1. Fraction to decimal 1. Divide the top number by the bottom number 1. Fraction to percent 1. Convert the fraction to a decimal 2. Move the decimal two places to the right and add a percent sign 1. Decimal to fraction 1. Determine place value of the furthest right number in the decimal (10th, 100th, etc.) 2. Write the place as the denominator and the number (without the decimal) as the numerator 1. Percent to fraction 1. Change percent to a decimal (see above) 2. Change decimal to a fraction (see above)