Subtract 9/72 from 21/10
1st number: 2 1/10, 2nd number: 9/72
21/10 - 9/72 is 79/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
21/10 = 21 × 36/10 × 36 = 756/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
9/72 = 9 × 5/72 × 5 = 45/360 - Subtract the two like fractions:
756/360 - 45/360 = 756 - 45/360 = 711/360 - After reducing the fraction, the answer is 79/40
- In mixed form: 139/40
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