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Fill in both fractions, pick an operator, and press Calculate.
From the book — Chapter 2. Mixed numbers get turned into improper fractions first (1 ½ becomes 3/2). To add or subtract, find a common denominator; to multiply, go straight across; to divide, flip the second fraction and multiply. Then reduce by dividing both parts by their greatest common divisor.
Denominators must be non-zero. Negative wholes flip the sign of the whole fraction. Everything stays in your browser.