What is 3/10 - 9/10?
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Here's how to subtract 9/10 from 3/10:
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Step 1Since our denominators match, we can subtract the numerators. 3 − 9 = -6 So the answer is:
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Step 2Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction? To find out, we try dividing it by 2... Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:
Let's try dividing by 2 again... Nope! So now we try the next greatest prime number, 3... Nope! So now we try the next greatest prime number, 5... No good. 5 is larger than -3. So we're done reducing. There you have it! The final answer is:
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