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There are 420 girls and boys at a concert The ratio of girls to boys at the concert is 3 to 7 How many girls are at the concert?
3+7=10 (3 and 7 are both ratio numbers) 420/10=42 (10 is the sum of both ratio) 3x42=126 girls (3 is ratio of girls) 7x42=294 boys (7 is ratio of boys)
What are the multiples of 7 up to 500?
7x1=7, 7x2=14, 7x3=21, 7x4=28,7x5=35, 7x6=42, 7x7=49, 7x8=56,7x9=63, 7x10=70, 7x11=77, 7x12=84,7x13=91, 7x14=91, 7x15=105, 7x16=112,7x17=119, 7x18=126, 7x19=133, 7x20=140,7x21=147, 7x22=154, 7x23=161, 7x24=168,7x25=175, 7x26=182, 7x27=189, 7x28=196,7x29=203, 7x30=210, 7x31=217, 7x32=224,7x33=231, 7x34=238, 7x35=245, 7x36=252,7x37=259, 7x38=266, 7x39=273, 7x40=280,7x41=287, 7x42=294, 7x43=301, 7x44=308,7x45=315, 7x46=322, 7x47=329, 7x48=336,7x49=343, 7x50=350, 7x51=357, 7x52=364,7x53=371, 7x54=378, 7x55=385, 7x56=392,7x57=399, 7x58=406, 7x59=413, 7x60=420,7x61=427, 7x62=434, 7x63=441, 7x64=448,7x65=455, 7x66=462, 7x67=469, 7x68=476,7x69=483, 7x70=490, 7x71=497
