Subtract 42/90 from 72/28
1st number: 2 16/28, 2nd number: 42/90
72/28 - 42/90 is 221/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
72/28 = 72 × 45/28 × 45 = 3240/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
42/90 = 42 × 14/90 × 14 = 588/1260 - Subtract the two like fractions:
3240/1260 - 588/1260 = 3240 - 588/1260 = 2652/1260 - After reducing the fraction, the answer is 221/105
- In mixed form: 211/105
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