Express 7/10 as %.

**The reasoning** To convert a fraction to a percentage, multiply by 100%. 7/10 × 100% = (7 × 100)/10 % = 700/10 % = **70%** Think of it this way: "percent" means "per hundred" or "out of 100." So we're asking: "If 7/10 is our value, how many out of 100 is that?" Since 10 goes into 100 exactly 10 times, we multiply both top and bottom by 10: 7/10 = 70/100 = 70%. **Why the wrong options tempt you** - **Option A (0.7%)**: This happens if you convert to a decimal (0.7) but forget to multiply by 100. The decimal form is NOT the percentage. - **Option B (7%)**: You just took the numerator and slapped a % sign on it, ignoring the denominator entirely. - **Option D (100%)**: This would mean the whole thing (10/10), not 7/10. **Quick takeaway** Fraction to percentage? Multiply by 100%. Decimal to percentage? Also multiply by 100%. The % sign means you've already done that multiplication!