Fractions might seem tricky at first, but they're actually quite...
Maths101 views·Updated Jun 23, 2026·1 pageMastering Fractions: Addition, Subtraction, Multiplication, and Division
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Ninah🤍@nonaandnana
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Fractions Review: The Four Operations
Multiplying fractions is the easiest operation - just multiply straight across! Take the top numbers (numerators) and multiply them together, then do the same with the bottom numbers (denominators). For example, 3/4 × 5/7 = 15/28.
Dividing fractions follows the "keep it, flip it, change it" rule. Keep the first fraction exactly as it is, flip the second fraction upside down, then change the division sign to multiplication. So 2/5 ÷ 4/7 becomes 2/5 × 7/4 = 14/20, which simplifies to 7/10.
Adding and subtracting fractions both need a common denominator first. Find the lowest common multiple (LCM) of both denominators, then convert both fractions. For adding 3/7 + 1/3, the LCM is 21, giving you 9/21 + 7/21 = 16/21.
Top tip: Always check if you can simplify your final answer by dividing both the numerator and denominator by their highest common factor!
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Maths101 views·Updated Jun 23, 2026·1 pageMastering Fractions: Addition, Subtraction, Multiplication, and Division
N
Ninah🤍@nonaandnana
Fractions might seem tricky at first, but they're actually quite straightforward once you know the rules! Whether you're multiplying, dividing, adding, or subtracting fractions, each operation has its own simple method that you can master with a bit of practice.
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Fractions Review: The Four Operations
Multiplying fractions is the easiest operation - just multiply straight across! Take the top numbers (numerators) and multiply them together, then do the same with the bottom numbers (denominators). For example, 3/4 × 5/7 = 15/28.
Dividing fractions follows the "keep it, flip it, change it" rule. Keep the first fraction exactly as it is, flip the second fraction upside down, then change the division sign to multiplication. So 2/5 ÷ 4/7 becomes 2/5 × 7/4 = 14/20, which simplifies to 7/10.
Adding and subtracting fractions both need a common denominator first. Find the lowest common multiple (LCM) of both denominators, then convert both fractions. For adding 3/7 + 1/3, the LCM is 21, giving you 9/21 + 7/21 = 16/21.
Top tip: Always check if you can simplify your final answer by dividing both the numerator and denominator by their highest common factor!
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