Add 15/20 and 45/84
15/20 + 45/84 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
15/20 = 15 × 21/20 × 21 = 315/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
45/84 = 45 × 5/84 × 5 = 225/420 - Add the two like fractions:
315/420 + 225/420 = 315 + 225/420 = 540/420 - 540/420 simplified gives 9/7
- So, 15/20 + 45/84 = 9/7
In mixed form: 12/7
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