Subtract 3/60 from 21/72
21/72 - 3/60 is 29/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 60 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 60 × 6 = 360,
3/60 = 3 × 6/60 × 6 = 18/360 - Subtract the two like fractions:
105/360 - 18/360 = 105 - 18/360 = 87/360 - After reducing the fraction, the answer is 29/120
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