Subtract 6/45 from 21/72
21/72 - 6/45 is 19/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 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 45 × 8 = 360,
6/45 = 6 × 8/45 × 8 = 48/360 - Subtract the two like fractions:
105/360 - 48/360 = 105 - 48/360 = 57/360 - After reducing the fraction, the answer is 19/120
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