Subtract 9/30 from 70/21
1st number: 3 7/21, 2nd number: 9/30
70/21 - 9/30 is 91/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
9/30 = 9 × 7/30 × 7 = 63/210 - Subtract the two like fractions:
700/210 - 63/210 = 700 - 63/210 = 637/210 - After reducing the fraction, the answer is 91/30
- In mixed form: 31/30
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