Subtract 21/72 from 21/5
1st number: 4 1/5, 2nd number: 21/72
21/5 - 21/72 is 469/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
21/5 = 21 × 72/5 × 72 = 1512/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Subtract the two like fractions:
1512/360 - 105/360 = 1512 - 105/360 = 1407/360 - After reducing the fraction, the answer is 469/120
- In mixed form: 3109/120
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