Subtract 70/81 from 30/75
30/75 - 70/81 is -188/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 81 is 2025
Next, find the equivalent fraction of both fractional numbers with denominator 2025 - For the 1st fraction, since 75 × 27 = 2025,
30/75 = 30 × 27/75 × 27 = 810/2025 - Likewise, for the 2nd fraction, since 81 × 25 = 2025,
70/81 = 70 × 25/81 × 25 = 1750/2025 - Subtract the two like fractions:
810/2025 - 1750/2025 = 810 - 1750/2025 = -940/2025 - After reducing the fraction, the answer is -188/405
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