Fractions, Decimals & Scientific Notation Fraction Operations Add/Subtract: find common denominator Multiply: multiply straight across Divide: flip and multiply (keep-change-flip) Converting Fraction → Decimal: divide numerator by denominator Decimal → Percent: multiply by 100 Percent → Decimal: divide by 100 Scientific Notation a × 10ⁿ where 1 ≤ a < 10 Positive n: large number (move decimal right) Negative n: small number (move decimal left) ACT Focus Mixed number arithmetic Ordering fractions/decimals on number line Operations with scientific notation