Add 70/63 and 45/40
1st number: 1 7/63, 2nd number: 1 5/40
70/63 + 45/40 is 161/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
70/63 = 70 × 40/63 × 40 = 2800/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
45/40 = 45 × 63/40 × 63 = 2835/2520 - Add the two like fractions:
2800/2520 + 2835/2520 = 2800 + 2835/2520 = 5635/2520 - 5635/2520 simplified gives 161/72
- So, 70/63 + 45/40 = 161/72
In mixed form: 217/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/63+90/40 70/63+45/80