Subtract 4/40 from 15/45
15/45 - 4/40 is 7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
15/45 = 15 × 8/45 × 8 = 120/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
4/40 = 4 × 9/40 × 9 = 36/360 - Subtract the two like fractions:
120/360 - 36/360 = 120 - 36/360 = 84/360 - After reducing the fraction, the answer is 7/30
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