70 and 80, yes.
12, no.
The factor pairs of 560 are: 1 × 560 2 × 280 4 × 140 5 × 112 7 × 80 8 × 70 10 × 56 14 × 40 16 × 35 20 × 28
LCD(70, 80) = 560
560
560
1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560
12
70 / 80 To go from 7 / 8 to x / 80, you would multiply the numerator and the denominator by 10. You can also find this using cross multiplication. 7 / 8 and x / 80 8x = 560 x = 560 / 8 x = 70
80 * 7 = 560
640/8 = 80 560/8 = 70 The answer will be between them, closer to 80. Estimate 76-77
The GCF is 2.
The GCF is 10.
7