Subtract 6/20 from 90/70
1st number: 1 20/70, 2nd number: 6/20
90/70 - 6/20 is 69/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
90/70 = 90 × 2/70 × 2 = 180/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
6/20 = 6 × 7/20 × 7 = 42/140 - Subtract the two like fractions:
180/140 - 42/140 = 180 - 42/140 = 138/140 - After reducing the fraction, the answer is 69/70
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