Subtract 21/80 from 42/9
1st number: 4 6/9, 2nd number: 21/80
42/9 - 21/80 is 1057/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
42/9 = 42 × 80/9 × 80 = 3360/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Subtract the two like fractions:
3360/720 - 189/720 = 3360 - 189/720 = 3171/720 - After reducing the fraction, the answer is 1057/240
- In mixed form: 497/240
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