Subtract 42/21 from 3/70
1st number: 3/70, 2nd number: 2 0/21
3/70 - 42/21 is -137/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
42/21 = 42 × 10/21 × 10 = 420/210 - Subtract the two like fractions:
9/210 - 420/210 = 9 - 420/210 = -411/210 - After reducing the fraction, the answer is -137/70
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