Subtract 21/30 from 32/70
32/70 - 21/30 is -17/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
32/70 = 32 × 3/70 × 3 = 96/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Subtract the two like fractions:
96/210 - 147/210 = 96 - 147/210 = -51/210 - After reducing the fraction, the answer is -17/70
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