Add 21/45 and 12/63
21/45 + 12/63 is 23/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
12/63 = 12 × 5/63 × 5 = 60/315 - Add the two like fractions:
147/315 + 60/315 = 147 + 60/315 = 207/315 - 207/315 simplified gives 23/35
- So, 21/45 + 12/63 = 23/35
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