Add 4/63 and 80/90
4/63 + 80/90 is 20/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
4/63 = 4 × 10/63 × 10 = 40/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
80/90 = 80 × 7/90 × 7 = 560/630 - Add the two like fractions:
40/630 + 560/630 = 40 + 560/630 = 600/630 - 600/630 simplified gives 20/21
- So, 4/63 + 80/90 = 20/21
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