Subtract 21/50 from 90/70
1st number: 1 20/70, 2nd number: 21/50
90/70 - 21/50 is 303/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
90/70 = 90 × 5/70 × 5 = 450/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
21/50 = 21 × 7/50 × 7 = 147/350 - Subtract the two like fractions:
450/350 - 147/350 = 450 - 147/350 = 303/350
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