Subtract 21/40 from 84/45
1st number: 1 39/45, 2nd number: 21/40
84/45 - 21/40 is 161/120.
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,
84/45 = 84 × 8/45 × 8 = 672/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Subtract the two like fractions:
672/360 - 189/360 = 672 - 189/360 = 483/360 - After reducing the fraction, the answer is 161/120
- In mixed form: 141/120
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