Subtract 42/9 from 90/8
1st number: 11 2/8, 2nd number: 4 6/9
90/8 - 42/9 is 79/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
90/8 = 90 × 9/8 × 9 = 810/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
42/9 = 42 × 8/9 × 8 = 336/72 - Subtract the two like fractions:
810/72 - 336/72 = 810 - 336/72 = 474/72 - After reducing the fraction, the answer is 79/12
- In mixed form: 67/12
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