Add 40/80 and 45/70
40/80 + 45/70 is 8/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
40/80 = 40 × 7/80 × 7 = 280/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
45/70 = 45 × 8/70 × 8 = 360/560 - Add the two like fractions:
280/560 + 360/560 = 280 + 360/560 = 640/560 - 640/560 simplified gives 8/7
- So, 40/80 + 45/70 = 8/7
In mixed form: 11/7
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