Subtract 21/72 from 90/28
1st number: 3 6/28, 2nd number: 21/72
90/28 - 21/72 is 491/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
90/28 = 90 × 18/28 × 18 = 1620/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504 - Subtract the two like fractions:
1620/504 - 147/504 = 1620 - 147/504 = 1473/504 - After reducing the fraction, the answer is 491/168
- In mixed form: 2155/168
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