Subtract 90/16 from 72/30
1st number: 2 12/30, 2nd number: 5 10/16
72/30 - 90/16 is -129/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
72/30 = 72 × 8/30 × 8 = 576/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
90/16 = 90 × 15/16 × 15 = 1350/240 - Subtract the two like fractions:
576/240 - 1350/240 = 576 - 1350/240 = -774/240 - After reducing the fraction, the answer is -129/40
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