Subtract 42/45 from 45/20
1st number: 2 5/20, 2nd number: 42/45
45/20 - 42/45 is 79/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
45/20 = 45 × 9/20 × 9 = 405/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
42/45 = 42 × 4/45 × 4 = 168/180 - Subtract the two like fractions:
405/180 - 168/180 = 405 - 168/180 = 237/180 - After reducing the fraction, the answer is 79/60
- In mixed form: 119/60
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