Subtract 30/6 from 72/90
1st number: 72/90, 2nd number: 5 0/6
72/90 - 30/6 is -21/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
72/90 = 72 × 1/90 × 1 = 72/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
30/6 = 30 × 15/6 × 15 = 450/90 - Subtract the two like fractions:
72/90 - 450/90 = 72 - 450/90 = -378/90 - After reducing the fraction, the answer is -21/5
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